Title: History of the Confederate Powder Works
Author: Rains, George Washington, 1817-1898
Language: English
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HISTORY OF THE
CONFEDERATE POWDER WORKS

By
COL. (GENERAL) GEO. W. RAINS.

Late of the Confederate Army.


An Address Delivered by Invitation
Before the Confederate Survivors'
Association, at its Fourth Annual
Meeting, on Memorial Day, April 26th,
1882.


THE NEWBURGH DAILY NEWS PRINT, NEWBURGH, N. Y.



ADDRESS.


_Fellow Confederate Survivors:_

In accepting your invitation to address you on the general history of
the Confederate Powder Works, I do so with some hesitation, on account
of my close personal connection with a subject which absorbed my
thought, time and energies.

In the history of a war we find, generally, but little reference to the
manufactories engaged in the preparation of material; they had been
previously established, and were in active operation before its
commencement, their products being immediately available for active
operations. An instance can scarcely be found in modern warfare where
previous preparations had not been made, and where the necessary
manufacturing works did not already exist.

The late war was entered upon unexpectedly. Throughout the Southern
country it was supposed that the North would not seriously oppose a
secession of the States from the Federal compact, hence no previous
provision had been made for such contingency, and no material of war
gathered.

Manufactories existed on a very limited scale, and none for war
purposes, hence their speedy erection was of extreme importance, and had
to be accomplished under the most unfavorable conditions.

The entire supply of gunpowder in the Confederacy at the beginning of
the conflict, was scarcely sufficient for one month of active
operations, and not a pound was being made throughout its limits. To
enter upon a great war without a supply of this essential material, and
without effective means of procuring it from abroad, or of manufacturing
it at home, was appalling.

No one was so well aware of this condition of things as the President of
the Confederate States, who, being an educated soldier, was fully alive
to the requirements of war, and at once took active measures for the
creation of war material. Among these, was the erection of a great
gunpowder manufactory.

It is the custom of the different nations, in addition to the private
factories of gunpowder, to have erected at different points national
works to supply the demand for war. The very limited resources of the
Confederacy not admitting of division, had to be accumulated at one
point. Mr. Davis was necessarily acquainted with most of the officers of
the old army, as he was graduated at West Point, served with great
distinction in the war with Mexico, and had been Secretary of War under
the Federal Government; he was thus enabled to select his agents for the
different services required. Thus that very competent officer, General
Gorgas, was placed at the head of the Ordnance Department; I had the
honor of being appointed to take charge of the manufactory of gunpowder,
a _carte blanche_ being given. The necessary works were to be erected as
nearly central as practical; to be permanent structures, and of
sufficient magnitude to supply the armies in the field and the artillery
of the forts and defences.

On the 10th July, 1861, I left Richmond to enter upon this duty. Making
a rapid tour through the South to find a suitable site, Augusta was
selected, for several reasons: for its central position; for its canal
transportation and water-power; for its railroad facilities; and for its
security from attack--since the loss of the works would have been
followed by disastrous consequences.

The small amount, comparatively, of gunpowder captured with the Navy
Yard at Norfolk, with that on hand from other sources, had been
distributed to the army gathering on the Potomac, to Richmond, Yorktown,
Pensacola, Mobile, New Orleans, and other places; scarcely any being
left for the force assembling under the command of General Albert Sidney
Johnson, in Kentucky. The Federal forces, having the requisite
advantages for equipment and transportation, were assembling in large
bodies, and the utmost energy was required to prevent the loss of a
battle by failure in ammunition. General Johnson's command was the most
urgent in its wants, hence required the first attention.

The State of Tennessee, through the energy of Governor Harris, and its
Military Committee consisting of General Harding and Colonel Bailey, had
at the earliest moment taken measures to supply his army by making
contracts for saltpetre, to be supplied from the limestone caves, and
with the Sycamore Powder Mill, not far from Nashville, which was to be
enlarged and put into immediate operation. These contracts were turned
over to the Confederate Government on my arrival in that city, and every
assistance possible given by the State authorities. Mr. S. D. Morgan, a
private citizen of Nashville, but a gentleman of great energy and
influence, rendered essential service to the officers of the
Confederacy. The Sycamore Stamping Mill was soon put into operation, but
its limited arrangements, particularly for preparing the saltpetre,
caused the product to be small. Notwithstanding the rapid construction
of new stampers, and other parts, it was only in the latter part of
September that five hundred pounds of powder daily were produced.

It was soon perceived that to increase the supply, a special refinery
for saltpetre would have to be erected; works accordingly were
projected, commenced, and mainly completed, at Nashville, by the 9th
October, on which day 1,500 lbs. were refined, and this amount was
gradually increased to 3,000 lbs. daily. Experts were not to be found,
and for some days every part of the operations were carried on under my
personal instruction.

Gunpowder contains three-fourths of its weight of saltpetre, and to have
its proper and enduring strength, this constituent must be refined to
almost chemical purity. Thus the obtaining of this material and its
preparation, became matters of the highest consideration.

The Governor of Georgia, at the suggestion of Lieutenant Boggs, late of
the Ordnance Department of the old army, had purchased a small cargo of
saltpetre and sulphur in Philadelphia, which fortunately arrived safely
at Savannah just before that port was blockaded. This store of material,
although comparatively small, was of extraordinary value, as from it
mainly the gunpowder for General A. S. Johnson's army was supplied, as
well as the Batteries at Fort Pillow, Island Number 10, and Memphis, on
the Mississippi river.

The earth of the limestone caves of Tennessee, Alabama, Georgia,
Arkansas, and other States, was rich in nitrate of lime, and this salt
was convertible into saltpetre by lixiviation and saturating with the
lye of wood ashes. Some of these caves were personally visited, and
great efforts made to have them worked to full capacity. Agents were
sent out to investigate their capabilities with authority to make
contracts, and supply the necessary information for their working; the
last was accomplished by means of a pamphlet which I published in
Nashville giving detailed instructions, and which was distributed
throughout the country; it was republished in Richmond, New Orleans and
other places. As rapidly as the crude saltpetre was received from the
caves it was refined and sent to the powder mills, and the products
mostly sent to General A. S. Johnson's command. About 100,000 pounds of
gunpowder were thus supplied before the fall of Nashville, besides a
considerable amount sent to New Orleans and other places.

The caves of Arkansas were rich in nitrous earth, and those of Texas
still more so, and these supplied the armies west of the Mississippi
river with material for gunpowder. As early as practicable I sent out
instructed powder-makers to both those States, who under the directions
of the military authorities, assisted to put up the necessary powder
mills for the Trans-Mississippi department, which after the fall of
Nashville was left necessarily to its own resources.

In the early part of November my time had become so much occupied that
it was no longer practicable to attend to the production of saltpetre,
and Mr. F. H. Smith was sent from Richmond by the Chief of Ordnance to
relieve me from its duties. At a later day a separate department was
established, called the Nitre and Mining Bureau, which then had the
entire charge of its production.

In the latter part of November, by the desire of General Lovell--the
able officer in command at New Orleans--I proceeded to that city and
examined the temporary arrangements for making gunpowder, and also
conferred with him relative to procuring a supply of saltpetre from
abroad. He suggested the chartering of the steamship Tennessee, then
lying idle in the river near the city, to proceed at once to Liverpool
and take in a cargo of saltpetre and return to New Orleans, or, in case
of necessity, to put in at Charleston or Wilmington. The suggestion met
my views, and was approved by Mr. Benjamin, then Secretary of War, but
was not carried out on account of the effective blockade of the mouth of
the Mississippi.

The Confederate Government, however, by its agents in Europe, purchased
saltpetre which was shipped on swift blockade runners which arrived from
time to time at Charleston and Wilmington. This proved to be adequate to
our wants, and about two millions, seven hundred thousand pounds were
thus received during the war and sent to the Confederate Powder Works.
The amount obtained from the caves amounted to about three hundred
thousand pounds for the same period. Thus the total amount received at
the works amounted to about 1,500 tons.

The Governor and Military Committee of Tennessee, in making the
contracts for war material, had engaged Mr. Whiteman, of Nashville, an
energetic citizen, to construct a Powder Mill at Manchester, who at my
suggestion adopted the incorporating process of heavy rollers on an iron
circular bed, such as I had proposed to employ at the Confederate Powder
Works erected at Augusta. The construction of this mill was urged on so
successfully, that by the middle of October one set of rollers was in
operation, and a second set in course of erection; a month later, by
supplying saltpetre and charcoal from the refinery at Nashville, 1,500
pounds of gunpowder were daily produced.

I had proposed at an early period to make this Powder Mill a school of
instruction for a few selected men, so as to have them ready for service
at the Augusta Powder Works when they should commence
operations--similarly to what had been done at the Refinery at
Nashville, where men were being taught to refine saltpetre and distill
charcoal. Before the occupation of Nashville by the Federal forces,
these men, together with the machinery and articles of the Refinery in
that city, were removed to the Augusta Works; thus they were supplied at
the commencement with the necessary means of operation, which could not
have been otherwise accomplished. But one man--Wright--could be found in
the Southern States who had seen gunpowder made by the incorporating
mill--the only kind that can make it of the first quality; he had been a
workman at the Waltham Abbey Government Gunpowder Works, in England. He
was made available in the operation of the Manchester Mill, and
afterwards for a short time at the Augusta Confederate Works, and
although sadly defective in a certain way, I was much indebted to his
knowledge and experience.

A singular good fortune happened at the commencement of my labors. I
came into possession of an invaluable pamphlet by Major Bradley, the
Superintendent of the Waltham Abbey Works; in this the entire process
and machinery employed at that Factory--the best existing in any
country--was succinctly stated; drawings, or working plans, or details
of the buildings, or apparatus, however, were not given.

Nowhere could be found a publication in which this was done of any
powder factory, hence in the projection of the Confederate Powder Works,
I was thrown upon my own resources to supply these deficiencies.

During the many hours spent in railroad cars, these matters were thought
over and planned separately as necessity required. A rough sketch was
made, dimensions given, and location designated; this data was placed in
the hands of capable men to carry out. In my young Architect and Civil
Engineer, C. Shaler Smith, recommended by the proprietors of the
Richmond Tredegar Iron Works, I at once recognised genius of a high
order, and placed in his hands my rough sketches of buildings to
elaborate and give architectural finish. All know with what result, the
fine taste exhibited in the massive and beautiful structures which
ornamented the banks of the Augusta Canal, for two miles, bore witness
of his success.

Good fortune also brought to my notice, by a casual encounter with
General Pendleton, Chief of Artillery at Richmond, a skilled machinist,
who had served his time at the Tredegar Works, and was then a Sergeant
in the Confederate army. He, William Pendleton, was applied for, and in
his acquisition, was gained a man of capability and integrity, into
whose hands could be confidently placed the erection of all the
extensive machinery then in process of construction. The responsible
duties of Superintendent of the Works were also committed to his charge.

The Tredegar Iron and Machine Works, at Richmond, were the only ones
throughout the South, having adequate capabilities for the construction
of the heavy and extensive machinery required in the projected
Confederate Powder Works. They were only partially available for the
purpose, however, as the demands made upon them for heavy artillery, and
for all kinds of urgent work required by the Government, absorbed their
resources, nevertheless, I was compelled to call upon them for most of
the twelve circular iron beds, and twenty-four ponderous five ton iron
rollers, with other work required for the incorporating Mills, which,
together, weighed 240 tons; two of the rollers were made in Macon and
two in Chattanooga.

The immense iron shaft, nearly three hundred feet long, varying from
twelve inches in diameter at the central portions, to ten inches and
eight inches, toward the extremities, was cast and completed in
sections, mainly, at the Webster Foundry and Machine Works at the latter
city; here, also, were made the twelve heavy spur wheels, and twelve
powerful friction arrangements to start and stop gradually each set of
rollers separately, as the main shaft, working in the extensive
subterranean archway, which extended below the line of mills, continued
its incessant revolutions.

The great gear-wheel, sixteen feet in diameter, attached to the centre
of this shaft, giving it motion, with its corresponding massive pinion
on the engine shaft, were cast and accurately finished at Atlanta.

The fine steam engine of 130-horse power, having two cylinders and a fly
wheel of fourteen tons weight, and five boilers was made at the North
just before the war, and brought to that city to be used in a flouring
mill. This was purchased as being exactly the motive power required.

It was designed to make use of the water power of the canal for all
purposes, but its available capacities at that time would not permit
this, for the large amount required by the incorporating mills; it was
employed at the other and more dangerous buildings, which required a
smaller amount of power. Two smaller steam engines--one procured at
Macon and the other at Selma--were employed in the Refining building.
Two Hydraulic Presses were procured at Richmond; the twelve iron
evaporating pans, each holding five hundred gallons, were cast at the
large Iron Works on the Cumberland River, in Tennessee. The extensive
copper drying pans for the powdered saltpetre, being together forty feet
long by nine feet broad, were made at Nashville; the four cast iron
Retorts, four feet long by three feet in diameter, with eight cast iron
coolers, and twelve sheet iron slip cylinders of nearly the same
dimensions, were made at the Augusta Confederate Foundry and Machine
Works, where also all the smaller machinery required was constructed.
Copper boilers were procured from Wilmington, N. C., being made of large
turpentine stills; pumps, pipe and cement from Charleston; sheet copper
from Savannah and Nashville; tin and zinc for roofing from Mobile; the
larger steam pipes from Hight's Foundry, in Augusta, and the smaller
from New Orleans; iron and coal for castings were had from North Georgia
and Alabama, and copper from Ducktown, in Tennessee.

Thus material was gathered from all the Southern States to unite with
the resources of the City of Augusta, to construct the largest and
finest Gunpowder Factory to be found in any country.

On the 20th of July, 1861, I examined the Augusta Canal and resources of
the city, and later selected the location of the Powder Works,
beginning at the site of the United States old Magazine, half a mile
from the western city limit. Land adjacent was purchased, and also that
between the canal and the river for a distance of two miles, so that the
different buildings required, might be separated by intervals of at
least one thousand feet for safety in case any one of them should have
an explosion.

It was remarkable that the most favorable conditions required in the
erection of an extensive Powder manufactory, were all met at this
location, and nowhere else attainable. These are:

1. A central point of the country, for obvious reasons.

2. On a main line of railroad communication, to distribute the products
to all parts of the country.

3. On a canal or river, which could afford a safe and economical means
of transportation of the pulverized materials in process of manufacture,
at the same time affording the necessary water-power to the different
buildings.

4. In the neighborhood of a town or city, from which mechanics and
employees, as well as necessary articles, could be obtained.

5. A location near which the best building materials could be procured
for permanent structures.

6. A temperate climate, where operations could be continued throughout
the year without obstructions from ice, and to avoid the hazard and
expense of warming the building.

7. A district of country free from lime and earthy salts, so that the
large amount of water required in the operations of the Saltpetre
Refinery should be as nearly pure as possible.

8. A location which would insure an abundant and cheap supply of the
proper kind of wood required in the making of gunpowder.

9. A situation which, whilst sufficiently near a town to procure readily
supplies and workmen, should, at the same time, be removed so far off
that the dangerous structures, should an explosion occur, would cause no
damage to the nearest inhabitant.

10. Hence, also, the canal or stream on which the works exist, should
have but little traffic or commerce, and, in the vicinity of the works,
should pass through a sparsely inhabited district.

The Augusta Canal, having been selected for the site of the Confederate
Powder Works, contracts were immediately entered into for the brick,
stone and carpenter's work, on very favorable terms.

At the beginning of the war, business was more or less paralyzed, so
that the manufacturers and builders were, to a considerable extent,
thrown out of employment, which enabled contracts to be made
advantageously at the usual prices. Thus, the total cost of the entire
works did not exceed three hundred and eighty-five thousand dollars.

The erection of these works on the ground of economy alone, was of great
service to the Confederate Government. The extreme hazard of importing
gunpowder through the blockade, raised its average price, the first year
of the war, to three dollars per pound. There were made one million
pounds at the works in that period, at a total cost, including the
materials, of one million and eighty thousand dollars; thus saving to
the Government in one year, one million, nine hundred and twenty
thousand dollars.

The requisite land having been purchased, and contracts made for
building materials, the site of the main buildings were located by
myself, and construction commenced on the 13th of September, 1861, under
the immediate supervision of Mr. ---- Grant, a young civil engineer from
Savannah. These buildings were erected of the excellent bricks supplied
by the Augusta and Hamburg yards, which were worked to their full
capacity, and above five millions were supplied. The handsome granite of
Stone Mountain, on the Georgia Railroad, was employed for the sills,
lintels, copings, and foundation stones. The whole of the buildings were
erected by Messrs. Denning and Bowe, of Augusta, the former having
immediate charge, and could not be surpassed for excellence of
workmanship.

The first structure--or the one nearest the city--was called the
Refinery building, because the central portion was used for such
purposes, but it included a saltpetre and sulphur warehouse, of a
capacity of fifteen hundred tons, on the east end, and a charcoal
department and machine shop with a steam engine on the west end. Rifle
and ballistic pendulums on the northeast, and the steam boiler house on
the northwest portions. There were four square towers at the corners,
used as offices; the entire structure forming three sides of a square,
fronting two hundred and fifty feet along the canal, and extending back
two hundred and seventy-five feet. The north side was mostly a brick
enclosure with high walls, but having no roof, and temporarily used for
storing wood--its ultimate destination was for workshops.

Within the square were located the kilns for drying the wood to be
distilled in the charcoal retorts; the copper boilers and other
apparatus for the extraction of the saltpetre from damaged powder; as
also the arrangement for the final extraction of the saltpetre from the
refuse of the Refinery; lastly, the great chimney, into which all the
smoke flues of the entire structure terminated.

In the projection of this part of the Powder Works, I conceived the
design of making the central portion present the appearance of a grand
monumental structure. For this purpose the chimney was placed centrally,
and its exterior dimensions considerably enlarged; in fact, it is
composed of two distinct parts, the chimney and outside obelisk; the
former being enclosed at its base by a square tower, nineteen by
thirty-five feet in height, whose battlements arose to view above the
front walls. From the top of this tower the enveloping obelisk
commenced, and ascended one hundred and fifteen feet, making the
complete structure one hundred and fifty feet from the ground to the
coping. The interior chimney flue is five feet square from bottom to
top. The corner stone, or rather the box, containing the usual
documents, was, by a fancy of the architect, placed in one of the
corners of the top coping of the obelisk.

The saltpetre refinery occupied the right central portion of the front,
being sixty-five feet long, fifty-five feet broad and thirty feet high,
open from the floor to the ventilated roof. At the east end were four of
the large evaporating iron pans, placed side by side, and elevated three
feet above the floor by the brick work which surrounded them; five
similar pans were in a corresponding position at the west end, and the
large copper drying pans occupied forty feet along the north side at the
same height. Each evaporating pan had a separate furnace, and the heated
air from the whole passed beneath, and in contact with the bottoms of
the drying pans on its way to the great chimney; the furnaces opened
into side rooms communicating with the outside open space in the rear of
the building. Thus the refining room was entirely free from ashes, dust
and smoke.

The centre space of the floor, about thirty-six feet square, was sunk
four feet to allow water from the canal to pass around the bottoms of
two of the large evaporating pans, which were placed therein near the
centre of this area, and nine feet apart; these were used for a special
purpose.

The best quality of gunpowder can only be made from the purest
saltpetre; the impurities of the crude material are mainly deliquescent
salts, which rapidly deteriorate the strength of the powder by the
moisture absorbed. To refine more or less the rough saltpetre of
commerce is then a necessity even in producing an inferior article.

To carry the refining process to the extent of nearly absolute purity,
required several successive crystallizations and washings, involving a
large amount of manual labor in the manipulation, and consuming much
time. This was particularly the case in the very large amount of
saltpetre, eight to ten thousand pounds per day, used by the Works, the
refining of which would demand extended buildings and apparatus, as well
as requiring a large number of operatives. Hence, it became desirable to
devise methods by which hand labor could be superseded by motive power
and machinery; in this I was entirely successful. Thus, in the
operations of filling the various boiling pans with water or
mother-liquor; the transference of the boiling solution of saltpetre to
the draining trough, and thence to the crystallizing machines; the
cooling down of the solutions, and their constant agitation to break up
the forming crystals into fine particles, and transferring of these to
an adjoining tank; the washing of the crystallized mass, and the
subsequent removal of the mother-liquor and wash-waters, were all
accomplished by machinery, with the assistance of two or three workmen
only.

The saving of time and labor was thus manifest, and the rapidity with
which these operations were performed, permitted a double and triple
process in a single day; thus allowing a degree of purity in the product
of refined saltpetre not attained in any other refinery. Its purity was
such generally, that there was not the one-hundred-thousandth part of
chlorides left in the salt.

Of the machinery used, the most important was a bronze revolving wheel
with buckets attached to the periphery, which worked into an iron pan or
kettle, whose section was an arc of a circle; the buckets grazed the
surface of the bottom and sides of this kettle, the bottom of the latter
being immersed in a current of cold water. The hot filtered solution of
the crude saltpetre was received into this kettle, and thus kept into a
state of rapid agitation, the effect being to produce a wet mass of
minute crystals, which, as fast as formed, were taken up by the sharp
edged buckets, and lifted sufficiently high to pour into a receiving
vat; this permitted the liquid part to flow back into the kettle. By
this means in a short time the entire mass of fine deposited crystals
from the rapidly cooled liquid, were removed to the vat. When the
operation was completed the remaining liquid in the kettle was by the
revolutions of the bronze wheel, discharged into one of the eight
capacious cisterns below the floor; there were two of these machines
employed.

The facility for work which this apparatus, with the other mechanical
appliances afforded, enabled the refinery to carry the purification of
the saltpetre beyond that of the most celebrated powder factories.

Adjoining this part of the Works was the Sulphur Refinery, where this
material was prepared from the crude stock, and made ready for the
incorporating process. About one hundred and thirty tons of very impure
sulphur had been received from Louisiana, for the use of the Powder
Works; it had been purchased before the war by the planters for use in
the making of sugar, and was bought up by the Confederate officers. The
best quality of gunpowder has its sulphur chemically pure, which could
be demonstrated by showing no trace of acid when powdered and boiled in
water, and should entirely evaporate on a piece of glass when heated,
leaving no stain. This can only be accomplished practically by
distillation. The crude article was melted and poured into upright,
thick wooden boxes five feet high and ten inches square at the bottom,
tapering upwards; when cold the earthy matters would be found in the
lower portion by subsidence, leaving about three feet apparently pure.
This was broken off and placed into two kettles of suitable form and
dimensions, having furnaces; the tops of these kettles were connected by
a bent iron pipe to an enlarged portion, which was surrounded with
water. On the application of heat the sulphur vaporized, and passing
over through the pipe was condensed in the cooled portion, whence it
trickled in a thick stream into a receiving vessel below; the first
portions being rejected, the remainder was of a beautiful citron yellow
when cold, and entirely pure.

Unlike the refined saltpetre, the purified sulphur had to be pulverized
and bolted like flour before being used. The former was done by two iron
wheels of twelve inches face and five feet diameter, weighing six
hundred pounds each, revolving on a bed circle of iron like the
incorporating rollers; the later was accomplished by bolters, but when
these were worn out and could not be replaced, for want of the silk
cloth, which was not to be found in the South, necessity compelled me to
devise a different, and as it proved, a superior method.

The pulverized sulphur was placed in barrels or cylinders, with hollow
axles, which were made to revolve slowly by machinery; there were ledges
on the interior which caused the sulphur to be lifted and poured over as
the cylinders revolved; a light current of air was blown through each,
entering the hollow axle at one end, and passing out through the axle at
the other end, which led into an adjoining room; there the impalpable
sulphur dust was deposited, much finer than by the usual bolting
process.

Adjoining this Refinery was the department in which charcoal was made
and pulverized. Charcoal for gunpowder has to be made of a porous
fine-grained wood, having very little ashes when burned; willow is
generally preferred, and was used at first in the Powder Works, but the
exigencies of the war taking away those who would ordinarily have
supplied it, rendered it impracticable to procure a sufficient quantity.
Recourse was had to the cotton wood, which was abundant; on trial its
charcoal was found fully equal to that of the willow for the purpose,
and was, thereafter always used.

Charcoal for gunpowder must be made by what is termed the distilling
process; that is, the wood must be heated in iron retorts to the proper
degree, to have it of the best quality and free from sand or grit. For
this purpose cast iron cylinders, or retorts, six feet long and four
feet in diameter were used, placed over furnaces, each having one end
solid and the other with a movable cover; into these were run the slip
cylinders, which contained the kiln dried cotton wood, split up into
sticks about one and a half inches in diameter, and entirely filling it.

The slip cylinders were charged with the wood in an outside apartment,
their covers put on, then readily moved by cranes to the retorts, into
which they were pushed; the covers of which were then luted with clay
and closely applied. The bottoms of the retorts being perforated,
permitted the escape of the vapors and gases into the furnaces beneath,
where inflaming, they supplied mainly the heat required in the
operation. In about two hours the slip cylinders were withdrawn from the
retorts and moved by the cranes over, and lowered into the cast iron
coolers beneath the floor; these had water from the canal circulating
around them; the covers being then put on to exclude the air, the mass
of charcoal was rapidly cooled. As soon as a slip cylinder was removed
from a retort a freshly charged one would take its place, and thus the
process was continued. The slip cylinders were taken out of the coolers
in succession by the cranes, and swung over a long and broad table upon
which their contents were dropped; here the sticks of charcoal were
separately examined and the imperfect rejected. The charcoal was then
placed in pulverizing barrels with bronze balls, which revolving by
machinery, soon reduced it more or less to a fine powder; it was then
bolted, and with the sulphur and saltpetre taken to the weighing house.
Here the three materials were arranged into sixty pounds charges, by
mingling forty-five pounds of saltpetre, nine pounds of charcoal and six
pounds of sulphur, which was then moistened and ready for incorporation.

Reflecting over the processes for making gunpowder, it suggested itself
that the chemical reactions would necessarily have the most favorable
conditions, when there should be the most intimate approximation of the
component molecules. That, as the charcoal by its combustion with the
oxygen of the saltpetre, supplied the expanded gases which produced the
explosive force, it was of the first consideration that there should be
the most perfect mixture practicable between these two ingredients.
Under the microscope a fine particle of charcoal was seen to be a mass
of carbon penetrated by numerous pores, hence it became necessary to
completely fill these minute pores with the saltpetre to have the best
condition. This might be accomplished by the usual processes, as the
charge is kept moistened when stamped or rolled, but as it will not
answer to have the mass wet during the incorporating operation, only
moist or damp, the completion of the process was necessarily delayed. If
this mass of material could be made into a semi-liquid condition by the
action of steam, the hot solution of saltpetre would speedily penetrate
the minute pores of the charcoal, and thus the desired end would be
rapidly attained.

Accordingly, the following process was devised: The moistened sixty
pounds charges, roughly mixed and moistened with water, were introduced
into horizontal cylinders of sheet copper thirty inches long by eighteen
inches in diameter. These cylinders revolved slowly on a common axis,
consisting of a heavy brass tube three inches in diameter, perforated
with holes. High pressure steam was introduced through the tube raising
the temperature to the boiling point while the water produced by
condensation, added to that originally used to moisten the materials,
reduced them to a semi-liquid slush, which was run out of the cylinders
after about eight minutes rotation. On cooling, this mud became a damp
solid cake, the saltpetre which in the state of boiling hot saturated
solution had entered the minutest pores of the charcoal, now
crystallizing. The cake as produced was transferred to the incorporating
mills, and under the five ton rollers was in an hour brought to the
condition of finished mill cake, ready to be cooled and granulated,
while without the steaming process, four hours incorporation in the
mills had previously been necessary to produce powder of the same
first-class character. The capacity of the work of the mills was thus
practically quadrupled, the thorough saturation of the charcoal with
saltpetre being accomplished by the steaming, while it remained for the
rollers merely to complete the incorporation of the whole mass and give
the required density to the mill cake.

The Incorporating Mills, twelve in number, extended along the canal
beyond the Refinery building and further back from its bank, having the
Laboratory between the two; they were two hundred and ninety-six feet
long. This separation was for safety, as they worked explosive material.
The walls were massive, being four to ten feet thick, the horizontal
section of each being that of a huge mortar of seventeen feet wide by
twenty-four feet long; the height of the walls was twenty-eight feet;
they faced alternately in opposite directions, so that an explosion of
one would not be communicated to those adjoining.

The fronts were constructed of light wood and glass, and the roofs of
sheet zinc, so that but slight resistance would be offered, upwards and
outwards, to the explosive force. A wing wall, nearly as high as the
main walls, and three feet thick, extended outwards from the centre of
the exterior back wall of each mill twenty feet, to guard still further
against the effects of an explosion. Behind these the powder-makers
stood, for safety, while starting or stopping the motion of the
ponderous rollers. This was done by means of a long lever, which threw
in or out of gear the friction arrangement, which worked each set
beneath the floor, in the thick archway which extended from end to end
beneath the mills. It has already been stated that this archway
contained the great iron shaft which imparted motion to all the mills,
and which derived its own from the large steam engine, which was located
above, in the centre apartments separating the mills into two divisions.

In addition to the above precautions to prevent the explosion of a mill
from extending to the others, above each set of rollers was balanced a
vessel containing about thirty gallons of water. This was connected by
means of a small iron shaft with a similar vessel to each mill of the
division. Thus, on an explosion in one mill, its bed-plate was instantly
drenched with water, and this caused the same to take place at the same
moment with all the others.

These precautions were rendered the more necessary by the carelessness
of the powder-makers, who might not remove the broke up powder cake from
the mill enclosure before placing a new charge under the rollers, thus
having one hundred and twenty pounds of material to take fire at the
same time--as once happened--producing a powerful explosion. There
occurred only three explosions at these mills--all before the steaming
process was adopted--and in the first only was any one injured. In that
one no material harm was done, as the two powder-makers--exposed by
their own carelessness--were at work again in a few days. This explosion
completely destroyed the slight roof, as well as the wood and glass
front, but did scarcely any other damage to the mill, and had no action
on the other mills further than drenching their beds with water. The
other two explosions were insignificant.

These incorporating mills consisted, each, of an iron circular flat bed
of seven feet diameter, fixed in a mass of masonry built up above the
brick archway, through the center of the floor, to a convenient height.
On this bed two massive iron rollers, six feet in diameter and fifteen
inches face, revolved. Each weighed five tons. They had a common axle of
wrought iron, of five inches diameter, and a vertical shaft of cast iron
passing through the centre of the bed, having a rectangular cross-head
through which the axle worked. This shaft connected below with the
machinery which gave it motion from the main shaft.

These rollers were not equi-distant from the centre of revolution, by
which arrangement every part of the charge of materials on the bed was
subjected to their action--which was crushing, grinding, mixing and
compressing; grinding and mixing from the twisting motion which followed
from so large a diameter revolving in so small a circle, and crushing
and compressing from the weight of the rollers.

To keep the powder on the bed, a wooden curb, funnel-shaped, two feet
high was placed around the circumference, fitting closely, extending
outwards at an angle of forty-five degrees. In the centre of the bed was
a short cylinder of metal, two feet in diameter and six inches high,
through the top of which the vertical shaft passed. This prevented the
powder working inwards. It also acted as a steam-chamber to keep the
bed-plate warm; but this was not used for the purpose, since the
steaming process rendered it unnecessary. A scraper, or plow, followed
each roller, which continually broke up the powder-cake, mixed its
fragments, and kept them in the path of the rollers.

At the commencement of the operation the charge of sixty pounds of
steamed materials was uniformly distributed over the bed; the rollers
were then set into motion, revolving about ten times each minute, which
continued for an hour; the broken up powder, or mill cake, which was
about five-eighths of an inch thick, was then removed from the bed,
having a blackish grey color and taken to the cooling magazines. These
were excavated in the clay and rock on the other side of the canal,
about one hundred yards distant; were four in number and separated from
each other; here the mill cake became cold and hard, and was ready for
the next operation, that of granulation.

The permanent building in which this was done was about fifteen hundred
feet distant from the Powder Mills, on the same side, further up the
canal; this, as well as each of the other permanent structures, was made
of brick, having thin walls and light roofs. Wood in the damp atmosphere
of the canal speedily decayed.

A natural growth of trees and brush-wood intervened between the
buildings along the canal, which were generally situated about one
thousand feet apart; thus the explosion of any one of them would be
harmless to the remainder. There was a temporary structure of wood used
at first for granulation, about one hundred yards distant from the
permanent building, on the opposite side of the canal; this, after a use
of some months, exploded with about three tons of gunpowder.

The explosion was heavy, shaking the earth for some distance, and
throwing up a convolving column of flame and white smoke five hundred
feet in height. It was composed of a series of confused masses of smoke
and heated air revolving in vertical planes with extraordinary velocity,
through which the flames flashed outwards in all directions; this was
followed by the thundering sound of the explosion, which vibrated the
air for a mile around, and was heard within the limits of the city.

There were seven men within the structure, a sentinel outside, and a boy
with a mule in a shed adjoining. The bodies of the seven men and the
boy, with the debris, were carried up with the ascending column, and by
its revolving action, reduced mainly to small fragments and dispersed;
the sentinel was killed by the shock, but his body was not otherwise
disturbed. A growth of small pines surrounded the place, which
effectually intercepted the lateral flying fragments; in fact the force
of the explosion did not extend outside a diameter of one hundred feet,
but within that area the trees were destroyed and the space where the
structure stood was ploughed up and nothing remained. At the time there
was no work being done, as the workmen were awaiting the arrival of the
boat with the mill cake. The careful foreman, Gibson, had been called
away, and probably the accident happened from matches falling on the
floor, as it had been found impossible to prevent their use by the
workmen, for smoking, when off duty. This was the only explosion at the
Works during the war, except the three at the Mills, already mentioned.
It demonstrated the safety of the arrangements, since there was no
damage to any portion of the Works except the destruction of the glass
sashes, and a slight movement of the roof of the permanent granulating
building, about one hundred yards distant. This was about to be
occupied, having been completed.

In the granulating building the cold mill cake was broken up into
fragments by bronze toothed cylinders of small diameter, and then by
smooth ones; these worked in pairs, and successively, in connection with
vibratory screens and sieving, all in one machine. By the action of this
arrangement the powder cake was broken into fragments, separated into
different sizes of grain, and each delivered into its proper receptacle.
A very large grained powder, each grain being a cube of one inch in
dimensions, and weighing about one ounce, was made by a separate
manipulation of the powder cake, and used for the very largest guns
only.

From the granulating building the powder was taken to the drying,
dusting and glazing department, 2500 feet further up the canal. There
was an intermediate building designed and used for several months, as
the dusting and glazing department, the drying alone being done in the
one above mentioned; afterwards the three processes were carried on
together in one structure. It was soon perceived that the drying
process, which was done by similar arrangements to those used at the
government works at Waltham Abbey, England, that is, by placing the
powder in small quantities in shallow trays in a frame work, over steam
heated pipes, required considerable manual labor and occupied much time.
It occurred to me that the same could be accomplished more speedily and
with far less labor, by a single operation, which would likewise perform
the glazing and dusting.

To accomplish this the powder from the granulating house was placed in
revolving cylinders having hollow axles, and a current of air warmed by
passing through an arrangement of steam pipes was blown through,
carrying the dust into its receptacle, leaving the grains clear. This
also dried and glazed them at the same time. Thus by one operation, by
machinery, all three processes were accomplished, resulting in a large
saving of labor and time. In addition, a beautiful jet black glazing was
given by admitting a small quantity of steam at the proper time to the
current of air, while the barrels revolved. This was not generally done,
however, as it was regarded of but slight, if any, practical value, the
usual glazing answering all required purposes.

Two hundred yards from this department was the boiler house supplying
the steam required for the pipes used in the drying process. Its chimney
was one hundred yards still further removed, communicating with the
furnace by a subterranean arched flue; thus sparks would have had to
drift over three hundred yards to reach the clean metal roof of the
drying building.

The finished gunpowder was taken to the next building, one thousand five
hundred feet beyond, up the canal, where it was weighed out and put into
strong wood boxes about two and a half feet long, by one foot square,
having the ends let into grooves; one of the ends had a strong wood
screw, two inches diameter, with an octagonal head. Experience proved
that these powder boxes, a devise of my own from necessity, were
superior to barrels, being stronger, occupying less room, standing
transportation better, and safer in use. No explosion ever occurred in
their transportation, notwithstanding the occasional Railroad accidents,
and the many thousands that were sent from the Powder Works during the
war.

The powder boxes being filled, were then transported to the magazine,
three quarters of a mile still further up the canal. This wood structure
was on a rising ground one hundred yards from the canal, enclosed by a
high fence. Its capacity was about one hundred tons of gunpowder.

At this, and every other separate building of the Powder Works, a
sentinel was stationed day and night, and the utmost vigilance used.
Also, each of the separate buildings along the canal, except the
magazine, containing large amounts of gunpowder, were enclosed with high
brick walls, having a single entrance.

At the Waltham Abbey Works, in England, the gunpowder cake after being
crushed, is subjected to compression by the hydraulic press to give it
sufficient density. I found that by using five ton rollers, the proper
compression could be given in the powder mills during the incorporation,
thus saving much labor and time. The hydraulic press, consequently was
only used to compress the powder dust into thin cakes, which were sent
to the granulating department to be used for fine grain powder only.

The press house was located between the Cooling Magazines and the
granulating building on the same side of the canal as the former. It was
a large brick structure provided with two hydraulic presses, cranes, and
other appliances, with a turbine water wheel to supply the required
motive power. After the discovery that the proper density could be
better given to the powder cake, by using sufficiently heavy rollers
during the incorporation, this department was used only for the purpose
above stated.

The interval of ninety feet between the Refinery building and the
Incorporating Mills, was mainly occupied by a fine building called the
Laboratory. It had a projecting tower in the front centre, twenty-five
feet square at the lower stories, which together were forty-five feet in
elevation. From this the upper portion fifteen feet square ascended to
the height of thirty feet, making seventy-five feet in all. The upper
part of this constituted the clock tower with its four large circular
openings for dials. These could be seen for a long distance.

This building which was very striking in its appearance, was never
completed in its interior, as the different work to be here performed
was being done at the Arsenal sufficiently well, in temporary
structures. Awaiting the completion of the clock, the time was struck by
hand, every half hour on the large bell suspended temporarily, in the
open building in rear of the Refinery.

The continual testing of the powder, as it was being manufactured to
insure its equality in strength, and to ascertain its exact propelling
force, was done for the fine graded powders, by excellent musket and
ballistic pendulums constructed at the Confederate Machine Works in
Augusta under my direction. For the cannon or large grain powders, by
the initial velocities given to the proper projectiles in an eight inch
Columbiad. To determine these velocities an accurately made
electro-ballistic machine, such as was employed at the West Point
Military Academy, was constructed at the same works. Also Rodman's
apparatus for determining the absolute pressure on each square inch of
the bore of the gun, exerted by the charge. In addition to these
instruments, complete arrangements for determining the gravimetric
densities and hygrometric properties of different samples of gunpowder
were made.

The foregoing appliances enabled accurate comparisons to be made at all
points between different gunpowders, and to determine the various
matters required in the manufacture of the first quality for the various
arms of service. That this was successfully done was certified to by
Boards of Artillery and Infantry Officers; after the war the captured
powder of these works was used in the School of Artillery practice at
Fort Monroe, on account of its superiority.

Mr. Davis, whilst President of the Confederacy, visited the works, then
in active operation, and in his recent valuable book, speaks in more
than one place in flattering terms of their products. Articles published
in the London Times were highly commendatory of the Works and their
results, which were copied in Continental papers. They were visited by
many distinguished civil and military gentlemen, both native and
foreign.

The great extent of the Powder Works and their immense capabilities,
were the admiration of all visitors. This was mainly due to the
foresight of the President of the Confederacy, who, comprehending the
requirements of a great war, then scarcely commenced, strongly drew my
attention to the probable necessity of very large supplies of gunpowder
to meet the service of artillery of great calibre, which would probably
be employed, as well as the largely increased quantities necessary to
meet the rapid firing of the improved small arms, with which infantry
and cavalry were now supplied.

The daily product of the Works varied with the demand for gunpowder, and
with the amount of saltpetre on hand. At no time after their completion
were they worked to their full capacity; indeed, were only worked during
daylight. Even when supplying the urgent call of General Ripley at
Charleston for cannon powder, to replace the twenty-two thousand pounds
consumed during the action with the iron-clad fleet; two days' work
nearly supplied that amount.

Notwithstanding the admirable serving of the heavy artillery at Fort
Sumter during that engagement, it would have fallen and Charleston
captured, had any but the strongest gunpowder been used. The armor of
the iron-clads, though constructed expressly to withstand the heaviest
charges and projectiles, gave way before its propelling force. Mr. Davis
makes the statement that the engagement between the Alabama and
Kearsarge would have resulted in a victory for the former, had Admiral
Semmes been supplied with the powder from these works. Any failure in
their construction and products would have rested with myself. A carte
blanche had been given, and there was no one to share the appalling
responsibility.

There were made at the Confederate Powder Works at Augusta, commencing
April 10, 1862, and terminating April 18, 1865, 2,750,000 pounds, or one
thousand, three hundred and seventy-five tons of gunpowder. This was
distributed throughout the Confederacy, mostly east of the Mississippi
river. There remained on hand, at the Magazine, at the end of
operations, about seventy thousand pounds, besides considerable amounts
of saltpetre and other material.

The Navy Department during the war established a manufactory of
gunpowder at Petersburg, Virginia, which was afterwards removed to
Charlotte, North Carolina, and then to Columbia, South Carolina. A
powder mill was put into operation at Richmond, Virginia, also, at
Raleigh, North Carolina, but the extent of their operations is unknown.
Two small stamping mills in the northwestern portion of South Carolina,
near the mountains, which were erected to make blasting powder for the
neighboring tunnel, were visited, but I found that they could be made
available only to a very limited extent.

The Confederate Powder Works were so constructed that the rough
materials were received at the building nearest the city; thence
successively passed up the canal from building to building in the
progressive stages of manufacture, until it arrived finished and ready
for shipping at the Magazine.

To facilitate the transportation, a short branch of railroad was
constructed connecting the canal basin with the Georgia Railroad. The
safe, economical, and ready means of transportation by the canal were
invaluable; no accident ever happened, notwithstanding the immense
amount of combustible material--over two thousand five hundred
tons--which had passed to and fro over it during the three years of
operations. From the canal bank to the entrance of each building, the
walks were covered with compressed sawdust, and rubber shoes were worn
by all operatives in the departments containing gunpowder.

It is an interesting fact that Augusta was the only city of note in the
South, which was not occupied at some time by the Federal forces during
the war; here the flag of the Confederacy floated undisturbed to the
end.

The extensive Sibley Cotton Factory has been erected on a portion of the
site of the Refinery, Laboratory and Incorporating Mills, and so
arranged that the Confederate obelisk stands conspicuously in front of
the centre; the battlemented and ornamental architecture of the Powder
Works was adopted in the construction of the Factory buildings, which
give them a fine and noble appearance.

Here was once heard the noise of the clanking wheels and muffled sounds
of the ponderous rollers of war, as they slowly concentrated into black
masses the enormous energies which were to shake the earth and air, with
the roar and deafening explosions of the battle field. Now the air is
again filled with the sounds of moving machinery, but it is the busy hum
of peaceful occupations which assist to clothe the world from the white
cotton fields of Georgia. The black material of war has given away to
the white staple of peace.

Of the extensive Confederate Powder Works nothing remains except the
obelisk enclosing the great Chimney. Its battlemented tower and lofty
shaft, large proportions and beautiful workmanship, will bear evidence
of the magnitude and style of their construction to future generations.



APPENDIX.


To the special duties of the manufacture of gunpowder were added the
command of the Augusta Arsenal, on the 7th April, 1862, and at a later
period that of the Military District of Augusta. In the early part of
February, 1863, in connection with Captain Fairfax, of the Confederate
Navy, the duties of getting into effective operation the extensive and
unfinished Foundry Works constructed at Selma, Alabama, under contract
with the War and Navy Departments, were superadded. When the
communication with Richmond was endangered, in the latter part of the
war, all the Arsenals south of Virginia, were committed to my charge.

It had been the design at an early period, of the Chief of Ordnance, to
convert the Arsenal at Augusta into one of construction, and Capt. Gill
was placed in charge with that object in view. On taking command, I
found there were no existing facilities for large constructive works;
thus the intention had to be for the time, abandoned, but it was found
available, by the erection of several wood structures, for lighter work,
such as the preparation of cartridges, fixed ammunition, signal rockets,
fuses, primers, grenades, nitric acid, fulminates and percussion caps,
etc.

It was necessary for works of construction to make available the water
power of the canal within the city; accordingly, a Machine and Foundry
establishment, then lying idle, was purchased. Air and cupola furnaces,
etc., were added to the Foundry, and lathes, planers, drills, etc., were
purchased from Holly Springs, Mississippi, and Columbus, Georgia, and
from Selma, Alabama, and other places, and added to those already
present in the Machine Works. Also an extensive and complete
gun-carriage department was erected, and a powder-box manufactory
established, together with several houses for the preparation of small
arm cartridges, and other purposes. These structures were rapidly
erected, and machinists, founders, blacksmiths, tinners, harness makers,
armorers, etc., and the various material required, were gathered from
all available sources. The large brick building erected by Captain Gill
at the Arsenal was converted into a harness and equipment department for
field artillery; also used for tin and blacksmith shops, hospital and
warehouse.

I was fortunate in obtaining skilled men for the heads of the several
departments; among these were, at the Arsenal, Professor Wilson,
Chemist; Master Armorer Oliver and F. Smyth; the last had charge of the
Tinners' department, and also was Captain of the Operatives' Military
company.

At the City Works were Foundry Superintendent Van Buren, of Clarksville;
Superintendent Markey, of the Gun Carriage Department; Superintendent
Walker, of the Machine Works. Mr. Wyman had charge of the Harness and
Saddle and Equipment Department, but the artillery harness was mostly
manufactured in the city, very satisfactorily, by Messrs. Jessup, Hatch
and Day. There were several valuable foremen in the different shops,
among them were Jaillet, Sharky, Shehan, Barr, and others, whose names
are not recalled.

I was also materially assisted by Military Store-Keeper Girardey and
several young officers--Captain Finney, and Lieutenants Waller, Collier,
Sparrow, Hallam, and Cadet Lewis, and towards the close of operations by
Captain Warren.

At the several works under my charge at Augusta, a large amount of war
material was manufactured, in 1863, 1864 and part of 1865. The record of
the last year has been lost. Among the various articles of the two above
years were the following, copied from my official reports to the Chief
of Ordnance:

110 Field Guns, mostly bronze, 12-pounder Napoleons. These guns were
cast, turned, bored and finished complete at all points. Four of them
now ornament the principal entrance to Washington's Headquarters, at
Newburgh, New York.

    174 Gun Carriages.
    115 Caissons.
    343 Limbers to Field Artillery.
    21 Battery Wagons.
    31 Traveling Forges.
    10,535 Powder Boxes.
    11,811 boxes for Small Arm Ammunition.
    73,521 Horse Shoes.
    12,630 Nitric Acid, pounds of.
    2,227 ounces of Fulminate of Mercury.
    2,455 Saddles, complete.
    2,535 Artillery Harness, single sets of.
    2,477 Signal Rockets.
    85,800 rounds of Fixed Ammunition.
    136,642 Artillery Cartridge Bags.
    200,113 Time Fuses.
    476,207 pounds of Artillery Projectiles.
    4,580,000 Buckshot.
    4,626,000 Lead Balls.
    1,000,000 Percussion Caps.
    10,760,000 Cartridges for Small Arms.

Together with an immense amount of Infantry, Artillery and Calvary
equipments.

One hundred of the 12-pounder Napoleon guns were formed into complete
Batteries, and sent to the Army of Tennessee and North Georgia; the
metal being received from Ducktown, Tennessee, and other places wherever
it could be procured, including Church and other bells, and captured
6-pounder bronze cannon. The improved Hand-Grenades with General G. J.
Raines' sensitive tubes were here manufactured, and many thousand sent
to the Confederate armies.

The Army of Tennessee, before the fall of Atlanta, being at one period
about to run short of small arm ammunition, and finding it impracticable
to procure sufficient additional labor in time, a call was made on the
ladies of Summerville and Augusta, to assist in making cartridges. This
call was answered with all the promptness which their devotion to the
cause inspired, and by their invaluable aid the danger was tided over by
the production of 75,000 cartridges per day.


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  | Transcriber's notes:                                             |
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  | Obvious spelling/typographical and punctuation errors have been  |
  | corrected after careful comparison with other occurrences within |
  | the text and consultation of external sources. In particular,    |
  | the word "ordnance" was consistently misspelled "ordinance" in   |
  | the original, and has been corrected.                            |
  |                                                                  |
  | The second line of the fourth paragraph on page 23 ("then in     |
  | active operation, and in his recent valuable book, speaks in")   |
  | was originally transposed to the end of the third paragraph.     |
  | This has been corrected to restore the sense of the text.        |
  |                                                                  |
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