United States. Census Office (12th census : 1900).

Bulletins of the twelfth census of the United States : issued from October 6, 1900 to [October 20, 1902] ... number 4 [-247] online

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Online LibraryUnited States. Census Office (12th census : 1900)Bulletins of the twelfth census of the United States : issued from October 6, 1900 to [October 20, 1902] ... number 4 [-247] → online text (page 82 of 222)
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220,304— October 7, 1879. J. PATTISON. , Improvement in explosive compounds.

An oleaginous flour or meal is combined with an explosive compound having
for its base chlorate of potash to prevent premature and spontaneous explosion.

no, 534— October 24, 1879. 0. B. HARDY. Improvement in blasting powder.

It is composed of crude nitrate of soda, 75 pounds ; sulphur, 20 pounds ; char-
coal, 20 pounds; common salt, 10 pounds; sugar, 5 pounds; and paraffine 3
pounds.

222,169— December i, 1879. E. J. WILLIAMS. Improvement in explosive com-
pounds.

It consists of potassium chlorate, 3 pounds; prussiate of potash, 1 pound;
bichromate of potash, 2 ounces; nutgalls, 5 ounces; cannel coal, 2 ounces;
starch, 6 ounces; and crude coal oil, 5 ounces.

2td,163—May 10, 1881. T. P. SLEEPER. Blasting powder.

It consists of potassium chlorate, 8 parts ; sugar, 7 parts; and charcoal, 1 part.
268, 518— December 5, 1S8-2. C. F. MOHRIG. Explosive compound.

It consists of potassium chlorate, 50 to 70 parts ; sugar, 12 to 15 parts ; charcoal,
5 parts ; black oxide of manganese, 5 parts ; metallic zinc, 10 to 20 parts ; water
and wax, 10 parts.

273,209— February 27 ', 1883. N. WIARD. Manufacture of gunpowder

It is formed in perforated pellets or grains with tapering perforations, the
exterior surface being of greater density than its interior surface.

281,565— July 17, 18S3. M. E. SANLAVILLE AND R. LALIGANT. Manufacture

of explosive compounds.

A composition consisting of carbonaceous matter, alkaline chlorate and
nitrate, alkaline bisulphate, and glycerine.

289,756— December 4, 188S. si R. DIVINE. Explosive compound.

It consists of a solid ingredient, as potassium chlorate, about 7J parts, and a
liquid ingredient, as the heavy oil of coal tar (dead oil), 1 part; mechanically
united.

289,760— December 4, 1883. S. R. DIVINE. Explosive compound.

It consists of potassium chlorate, about 8* parts and turpentine, 1 part;
mechanically mixed.

289,762 — December 4, 1883. S. R. DIVINE. Explosive compound.

From 1 to 3 per cent of sulphur is combined with the moist mass of No. 289,756
(potassium chlorate and dead oil).

289.765— December 4, 1883. S. R. DIVINE. Composition for preparing explosive

compounds.

A fluid mixture constituting the liquid ingredient of an explosive consists of
the liquid ingredient of the explosive— as dead oil— and a volatile fluid, such as
bisulphide of carbon having finely divided sulphur dissolved in the volatile
fluid.

312,010— February 10, 1885. R. S. PENNIMAN. Protected nitrate of ammonia for

use in explosive compounds.

Granulated or finely divided nitrate of ammonia is protected against deli-
quescence by a coating of petroleum or its soft and viscous products.

334,824— March 31, 1885. A. GACON. Blasting powder.

A mixture of nitrate of potash (orsoda), 69 parts; flowers of sulphur, 19 parts;
ashes, 12 parts; and tannin, 2 parts; all by weight.

320,583— June 23, 1885. R. S. PENNIMAN. Explosive compound.

A high explosive consisting of nitrate of ammonia coated with petroleum or
its soft products— No. 312,010— combined with potassium chlorate as a detonator.

383,152— December 29, 1885. R. S. PENNIMAN. Explosive compound.

It is composed of protected grains of nitrate of ammonia— No. 312,010— and
grains of potassium chlorate mixed with a dry powdered material— as carbonate
of magnesia— to prevent the latter from caking.
352,611— November 16, 1886. E. D0 PONT. Explosive compound.

It consists of a nitrate and sulphur combined with charcoal retaining its
fibrous structure (baked wood).

362,899— May 10, 1887. T. NORDENFELT AND V. A. MEURLING. Manufac-
ture of gunpowder.

Sulphur is incorporated with carbonaceous matter, by dissolving the sulphur
in bisulphide of carbon, impregnating the carbonaceous matter with the solu-
tion, and evaporating the bisulphide. It is then impregnated with saltpeter or
equivalent salt in solution, and the solvent evaporated. Cotton or other vege-
table fiber is treated with hydrochloric acid (gaseous or liquid) to obtain
carbonaceous matter.
363,887— May 31, 1887. E. DU PONT. Explosive compound.

A compound of a nitrate, sulphur, charcoal retaining its fibrous structure, and
a carbohydrate, as sugar.
370,025— September 13, 1887. K. J. SUNDSTROM. Blasting powder.

A mixture of sodium nitrate, say 370 parts; wood tar, 70 parte; resin 88 parte;
and sulphur, 50 parts; produced by moistening the nitrate with a soiut j
the wooS tar and resin, and then mixing with the coated nitrate a solution of
the sulphur in a volatile solvent, as bisulphide of carbon.



37 '4,740- -December IS, 1887. L. G. HEUSSCHEN. Explosive compound.

It consists of coal oil and glycerine, together with potassium or sodium
nitrate, sulphate of iron and sulphuric acid, carbonaceous matter and sulphur.

376,81$— January 24, 1888. C. E. BICHEL. Manufacture of explosives.

Sulphur and a hydrocarbon are distilled in the presence of one another, and
potassium nitrate, or equivalent oxygen-bearing substance, is added to the
resultant body.

381,507— April 17, 1888. C. J. OLDS. Gunpowder.

It consists of carbonized peas, combined with saltpeter, sulphur, and char-
coal from willow or other trees.

393,631— November 27, 1888. A. FAVIER. Explosive and method of making same.
An explosive consisting of a highly compressed intermixture of a nitrate and
a hydrocarbon, produced by mixing a pulverized nitrate, as ammonium nitrate,
and a waterproof hydrocarbon fusible at a low temperature, and agglomerat-
ing the mixture under high pressure.

397,095— January 29, 1889. R. SJOBERG. Blasting compound.

It consists of ammonium oxalate, a nonnitrated hydrocarbon, as naphthalene,
and potassium chlorate, with or without a liquid nonvolatile hydrocarbon, as
astral oil.

428,635— December 31, 1889. A. F. WOODS. Gunpowder.

A mixture of potassium chlorate, 4 parts; yellow prussiate of potash, 1 part;
and a carbohydrate, such as sugar, 1 part.

448,363— March 17, 1891. R. S. PENNIMAN. Process of manufacturing nitrate of
ammonia.

Protected nitrate of ammonia is produced by mixing the protecting medium
with the nitrate while in a melted condition, cooling, and graining by agita-
tion. Nitric acid is mixed with ammoniacal liquor, settled, and concentrated
by evaporating the main portion of the water, dehydrated, and then mixed,
while in its initially melted condition, with the grain-protecting medium.

474,529— May 10, 1892. F. ROLLER. Manufacture of explosives.

A compound consisting of nitrate grains coated with colophony, with or
without a solid, fatty substance, such as spermaceti, and an oil in which the
colophony is dissolved, such as cottonseed oil.

483,225— September 27, 1892. F. AUCHMAN. Blasting-powder.

It consists of malt germs or cooms, ammonium nitrate, and potassium chlo-
rate.

522,042 — January 2, 2894. H. MAXIM. Process of making chlorate blasting-
powder.

Potassium chlorate and sodium, or potassium nitrate, are combined in a state
of fusion and reduced to a fine state of division prior to the admixture of com-
bustible elements. The oxygen-bearing salt is first fused and the potassium
chlorate then added.

51S,72S—July 16, 1895. F. G. A. BROBERG. Blasting-powder.

A free running powder consisting of particles of nitrate of soda coated with a
mixture of resin and sulphur; produced by adding dry pulverized nitrate of soda
to melted sulphur and resin and agitating the mixture.

546,552— September 17, 1895. B. C. PETTINGELL. Blasting-powder.

Process of manufacture consists in first immersing the powdered carbon singly
and alone in an aqueous solution of niter, and afterwards adding and mechan-
ically mixing the other ingredients, as sulphur and woodpulp.

565,593— August 11, 1896. M. BIELEFELDT. Safety explosive.

Formed of from 90 to 92 parts of ammonium nitrate, 5 parts of resin, and from
3 to 5 parte of a chromium compound, such as chromous hydroxid.

593,568— November 16, 1897. H. R. VON DAHMEN. Blasting powder.

It is composed of ammonium nitrate, phenanthrene, and potassium bichro-
mate; produces a low explosion temperature.

598,096— February 1, 1898. T. IEVLEY. Explosive.

A compound consisting of potassium chlorate; a metallic oxid or oxides, as
sesquioxid of iron and oxid m manganese; petroleum, and turpentine; with
or without a moderator, such as an oil of the fatty-acid series, as oil of almonds.

608,316— August 2, 2898. G. BENEKE. Explosive and method of making same.

A compound of ammonium nitrate, resin, and an alkaline carbonate, with
or without an oxidizing material such as alkaline chromate; produced by
incorporating the alkaline carbonate (and the oxidizing material) with the
resin when the latter is in a liquid state, cooling and pulverizing, and then
incorporating with the ammonium nitrate.

647,606— April 17, 1900. R. S. PENNIMAN AND J. C. SCHRADER. Resinous dope

and method of making same.

Vulcanized resin, adapted for use in explosive-compound dopes, produced by
mixing resin and sulphur, highly heating for vulcanizing the resin, then cool-
ing, breaking up, and pulverizing.

650,225— May 22, 1900. M. BIELEFELDT. Explosive.

A compressed mixture of sodium nitrate, potassium nitrate, sulphur, coal tar,
and potassium bichromate, the proportion of sodium nitrate being greater than
the aggregate of the other ingredients.

655,832— August 14, 1900. J. ROSS AND W. D. CAIRNEY. Blasting powder.

A mixture of potassium chlorate, 75 per cent; black oxide of manganese, 6 per
cent; charcoal, 6 per cent; wax, 9 per cent; and vaseline, i per cent. Process of
manufacture consists in granulating the potassium chlorate, mixing therewith
the granulated charcoal and black oxide of manganese, then mixing in the
wax, and heating until moist with the melted wax, then adding the vaseline
to fill all crevices and supplement the coating.

656, 048— August 14, 1900. J. ROSS AND W. D. CAIRNEY. Explosive and process

of making same.

A mixture of potassium chlorate, 87 per cent; charcoal, 3 per cent; wax, 7 per
cent; and vaseline, 3 per cent; the process being the same as No. 655,832.

656,678— August 28, 1900. J. A. STRANSKY. Smokeless powder.

A compound of potassium chlorate, 20 ounces; sugar, 16 ounces; alum, 1 dram;
sulphur, 1 dram; and alcohol.



248



MANUFACTURING INDUSTRIES.



NITROGLYCERINE.

50,617— October 2k, 1865. A. NOBEL. (Reissues: Div. A, 8,877— April 13, 1869; i,815,

March 19, 1871; 5,621, October 21, 1878; 5,798, March 17, 187k. Dill. B, 3,378— April

18. 1869; k,816, March 19, 187%; 5,620, October 21, 1873; 5,800, March 17, 187k. Div.

C, 8,379— April IS, 1869; k,817, March 19, 1872. Div. D, 3,380— April IS, 1869; k,818,

March 19,1872.) Improved substitute for gtmpowder.

Nitroglycerine is exploded, throughout its entire mass, by confining same
and subjecting it to excessive pressure, or to an impulse of explosion, as by
means of an auxiliary explosive, an electric spark or heat, or other means.

It is placed either within or around an exploding charge or igniter.

In the manufacture of nitroglycerine streams of acids and of glycerine are
poured together into a mixing tube and discharged into water maintained at a
low temperature.

57,175 -August Ik, 1866. A.NOBEL. (Reissues: A 2,537— April 2, 1867, product;
B 2,588— April 2, 1867, process; B, Div. 1, 3,881— April IS, 1869, process; B, Div. 2,
3,382— April IS, 1869, apparatus.) Improved explosive compound.
Nitrine or crystallizing nitroglycerine, produced by the admixture of

glycerine, sulphuric aeid, and nitric acid, free, or nearly free, from hyponitric

acid.

60,573— December 18, 1866. T. P. SHAFFNER. Improvement in methods of blast-
ing with nitrolcum.

The nitroglycerine may be mixed with sand, for blasting; or the charge is
poured into the hole, tamped with water, and fired with a tamping charge near
the top; or the water tamping maybe omitted and the firing canister suspended
near the top of the hole, with the blasting charge in the bottom, and space
between, there being sand tamping above the former.

76,1,99— April 7, 1868. G. M. MOWBRAY. Improvement in the manufacture of

nitroglycerine.

Compressed air, dried and cooled, is introduced during the process of manu-
facture, to preserve a low temperature, and convert any hyponitrous acid pro-
duced.

85, 906 -January 19,1869. S. CHESTER AND O. BURSTENBINDER. Improved

method of preparing nitroglycerine.

The ingredients are mixed under an atmosphere which will not support com-
bustion, as carbonic-acid gas. The mixture is cooled by the ebullition of cool
compressed carbonic-acid gas through it and caused to rotate by means of jets
of escaping gas.

86,701 — February 9, 1869. T. P. SHAFFNER. Improvement in preserving nitro-
glycerine, etc.
Water is placed in a vessel containing nitroglycerine for transportation or

storage.

98,756— August 17, 1869. T. P. SHAFFNER. Improvement in the manufacture of
nitro-glycerine.
A cold water jacketed tank is used, having curved agitating arms.

98,1,25— December 28, 1869. T. P. SHAFFNER. Improvement in the manufacture

of nitro-glycerine.

It is washed and agitated by forcing water and air into it by means of a per-
forated pipe at the bottom of a tank.

98,1,26— December 28, 1869. T. P. SHAFFNER. Improved process of preserving

nitroleum and other explosive liquids.

Sponge, or like elastic porous substance, is used to hold nitroglycerine in
suspension for storage or transportation. It is released by immersing charged
sponge in warm water— say 60° F.

112,8k8— March 21, 1871. E. A. L. ROBERTS. Improvement in the manufacture of

nitro-glycerine.

The amount of sulphuric acid in the acid bath is gradually increased simul-
taneously with the pouring in of the glycerine. The proportionate amount of
sulphuric acid used in the first instance is reduced.

112,8i9— March 21, 1871. E. A. L. ROBERTS. Improvement in the manufacture of

nitro-glycerine.

The glycerine is introduced in a bath of mixed acids in which a rapid circula-
tion of the fluid contents of the bath is maintained.

121,898— December 12, 1871. E. A. L. ROBERTS. Improvement in the manufacture

of nitro-glycerine.

The acids and glycerine are mixed in a water-cooled tube so constructed as to
produce the tumbling or cascading of the liquids within.

237,440 — April 1, 1878. A. HAMAR. Impovement in the manufacture of nitro-
glycerine.

The acid and glycerine flow through a trough and discharge upon a cooling-
coil, into a solution of sodium chloride.

16k,260—June 8, 1875. P. CASTELLANOS. Improvement in the manufacture of
nitro-sulphuric acid for manufacturing nitro-glycerine.
See Group I, Mixed Acids.

16k,261—June 8, 1875. P. CASTELLANOS. Improvement in recovering acids from

residuum of nitro-glycerine manufacture.

See Group I, Mixed Acids.
226,867— April 27, 1880. F. MANN. Process of manufacturing nitro-glycerine.

Nitroglycerine is separated from its acid mother liquor by freezing the mixed
acids and nitroglycerine and then separating the crystallized nitroglycerine
by a centrifugal machine.

21,0,516— April 26, 1881. L. HINCKLEY. Method of handling nitro-glycerine.
Nitroglycerine is confined in closed vessels, tubes, cartridges, or shells under

Eressure, to render it nonexplosive by ordinary shocks or jars. It can be thus
red from a gun with ordinary gunpowder.

21,1,91,1 — May 2k, 1881. G. S. DEAN. Method of preparing nitro-glycerine com-
pounds.

Nitroglycerine is mixed with a pulverulent nitro-compound and water (say
2 to 3 per cent of water) to increase the safety in handling and transportation.

262,769— August 15, 1SS-2. W. N. HILL. Process of and apparatus for the production
of nitro-glycerine.

Glycerine is mixed with a portion only of the acid, the reaction taking place
with agitation by air or otherwise, then the partially converted mixture is passed
into another and larger vessel, and the necessary quantity of acid added to
complete the conversion.



klS,070— October 15, 1889. E. LIEBERT. Manufacture of explosives.

Isoamyl nitrate is added to nitroglycerine, or a mixture of glycerine with
isoamyl nitrate or isoamyl alcohol is nitrated, to lower the freezing point and
make the nitroglycerine less sensitive to shocks.

iS2,SS6—July 15, 1890. S. D. SMOLIANINOFF. Explosive compound.

A mixture of nitroglycerine and an alcohol, as methyl alcohol, with or without
an absorbent and a fulminate.

449,687— April 7, 1891. H. S. MAXIM. Process of and apparatus for making



The glycerine and the nitrating agent are separately atomized and then inter-
mingled as spray, and the mixture quenched with water. Also claims for the
apparatus.

4-5? ,002— August 4, 1891. E. K. MITTING. Process of making nitro-glycerine.

A charge of glycerine is nitrated, the spent acid drawn off and the product
treated anew with a fresh charge of nitrating acid in excess, and finally the
nitroglycerine separated from the fresh excess charge of acid, which is used to
nitrate a second charge of glycerine, repeating the operation in the same
nitrating vessel.

k82,S72— September IS, 1892. J. LAWRENCE. Process of recovering nitro-glycerine

from waste acids.

The glycerine is nitrated and the nitroglycerine separated from the waste
acids, then sulphuric acid may be added to the waste acids, and they are cooled
to a temperature below the freezing point of nitroglycerine and above the
freezing point of the acids, and the remaining nitroglycerine recovered.

CELLULOSE NITRATES AND OTHER ORGANIC NITRATES.

4,574 — December 5, 18k6. C. F. SCHONBEIN. Improvement in preparation of

cotton-wool and other substances as substitutes for gunpowder.

Vegetable fibrous substances are treated with a mixture of nitric acid and
sulphuric acid, or with pure nitric acid of greatest specific gravity. The ex-
plosive cotton may be impregnated with potassium nitrate or other chemical
substitutes.

kS,166—June Ik, 186k. W. LENK. Improved gun-cotton.

Gun-cotton is produced by a process involving a specific series of steps, in-
cluding, among others, the immersion of the gun-cotton in a solution of water-



k7,S16 — April 18, 1865. J. P. McLEAN. Improvement in the manufacture of gun-
cotton and lint.
The fibers of the Asclepias syriaca, or milkweed, are used, either as fiber or in

the form of yarn or fabric made thereof.



50,082— September 19, 1865. J. J. REVY. Improvement in i
cotton. .



s manufacture of gan-



The process calls for a specified series of steps, the acid mixture being formed
of monhydrated nitric aeid of a specific gravity not under 1.52 and mono-
hydrated sulphuric acid of a specific gravity not under 1.84. It is spun into a
lightly twisted yarn. The cotton yarn is boiled in a weak solution of water
glass. The yarn is wound into the form of cartridges, or spun into ropes, woven
into cloth, and then made up into cartridges.

60,083 — September 19, 1865. J. J. REVY. Improvement in the manufacture of gun

cotton.

The cotton is prepared by washing in an alkaline solution. In treating with
acid, small and regular quantities are dipped in a considerable quantity of
acid, fresh acid being added after each dipping to compensate for that removed.
The acid is removed from the exterior of the fiber by saturating with water and
treating in a centrifugal machine, and from the interior of the fiber by placing
the fiber on perforated shelves and percolating water therethrough. Water
glass is applied by means of a centrifugal machine, the solution being applied
cool.

59,888— November
cotton.



, 1866. F. A. ABEL. Improvement in the manufacture of gun-



Gun-cotton is reduced to a pulp and consolidated, with or without pressure,
into solid forms, with or without the admixture of binding materials. Soluble
and insoluble gun-cotton may be combined, pulp mixed with fibrous cotton,
and the compressed forms coated with soluble gun-cotton, or shellac.

60,571— December 18, 1866. T. P. SHAFFNER. Improvements the manufacture of
gun-cotton.

Saturation and washing are performed under pressure, to compel the fluids
to thoroughly permeate the fiber.

98,757— August 17, 1869. T. P. SHAFFNER. Improved method of blasting with

gunpowder and other explosive substances.

Non or partially explosive materials are interposed between the fibers of gun-
cotton, grains of powder, or nitrated or explosive materials to spread the action
of the gases.

12k,510— March 12, 1872. R. PUNSHON. Improvement in explosive compounds

from gun-cotton.

Sugar is mixed with gun-cotton; as by dissolving sugar equal to one-third of
the weight of the cotton in a minimum quantity of boiling water, thoroughly
mixing finely cut gun-cotton therewith, and drying.

128,h50—June 25, 1872. J. B. MUSCHAMP. Improvement in explosive substances

and iirocesses of manufacturing the same.

Comminuted cellulose woody fiber, purified of sap and mineral salts by treat-
ment in strong caustic soda under pressure and washed, is treated with the acid
bath, washed, and steeped in an alkaline solution, washed, and dried; the first
dip producing the strongest explosive. A second quantity of fiber is treated in
the same bath (second dip) to produce a weaker explosive; and a third for a
still weaker explosive. To retard the rapidity of explosion it is steeped in a
solution of starch.

139,738— June 10, 1873. T. P. SHAFFNER. Improvement in explosive compounds.

Gun-cotton, or other nitrated fibrous substance, is combined with nitrated

water, or liquids, or parafnne, or beeswax, or any oleaginous or resinous matter.

Ul,65k— August 12, 1878. S. J. MACKIE. Improvement in the manufacture of
gun-cotton.

Gun-cotton is crushed to destroy its capillary structure and reduce it to an
impalpable mass, and then granulated. It is dried in vacuo.



DIGEST OF PATENTS RELATING TO CHEMICAL INDUSTRIES.



249



M chf t ^t^n^urfof^^^ ^- ^"™ * paring soluble

to^MSE ^^^K^oT&s Kf. ootton is » ed

meil-December 10, 1878. J. W. HYATT. Improvement in apparatus and proc-
esses for tlie manufacture of nitro-cellulose. ppanuiu> ana proc

Soluble fiber is made from paper by successive steps of "disintegration " into
SSfJ?.*? *^ eS - ; c ,? nv f, r « on " in an a C i d batn (with Centrifugal and cenlripetal
™£™lV~ deS1 H Ca ? on ^ by drymg in a cen trifugal machinl; and "ablution^
Claims are made for the apparatus.

230,216-Jidy to, 1880. J. A. ARRAULT, J. AND C. SCHMERBER. Process for
manufacturing nitro-derivatives from cellulose, etc. *-"jws iur

,J t L tT t t^f}Z a l iv J a > re - P roduced by treating the cellulose, starch, glucose, etc.,
with the fumes of nitric acid or nitric acid in a gaseous state.

2SS,916— March IB, 1S81. F. C. KEIL. Explosive compound.

iJl ™,°„ «?| , ^? d °{ nitroglucose (dextro-glucose made from starch) dissolved
in a volatile solvent, such as alcohol, and mixed with potassium nitrate, potas-
sium chlorate, and prepared vegetable fiber.

Si3,89S-June 14, 1881. G. S. DEAN. Process of making nUro-dextrinc.

Vegetable fiber is treated with dilute sulphuric acid, wherebv its structure is
destroyed and dextrmation commenced, and afterwards it is nitrated with con-
centrated mtro-sulphuric acid.

2U,575-July 19, 1881. C. A. FAURE AND G. TRENCH. Explosive blasting

It consists of intimately mixed carbonaceous and oxidizing materials in gran-
ular form, with finely divided nitrocellulose distributed around the granules.
?49,490— November IS, 1S81. C. W. VOLNEY. Explosive compound.

A mixture of monochlordinitrin or chlorpropenyldinitrate, and a nitrate of
potassium, sodium, barium, or other suitable alkaline metal, in equivalent
quantities to effect a mutual decomposition, with or without chlorates of the
said metals, vegetable fiber, or charcoal.

251,U5— December SO, 1S81. Q. VON PLANITZ. Explosive compound.

A base lor explosives formed by the combination of nitric acid and resin, pro-
duced by spreading pulverized resin on a bath of nitric acid and water heated
to the boiling point, and skimming off the resulting soft foamy product.

252,600— January 2k, 1882. C. DITTMAR. Explosive compound.

"Chlornitrosaccharose," or nitro-sugar, produced by dissolving sucrose in
chlorhydrin and then converting it into a nitro compound.

27 1>,3S5— March 20, 1S8S. J. W. HYATT AND F. V. POOL. Manufacture of
pyroxyline.

The fiber is treated with acid; the residual acid is then freed from matter in
suspension by use of barium sulphate or otherwise, and the spent acid is analyzed
and its strength restored according to the original formula.



Online LibraryUnited States. Census Office (12th census : 1900)Bulletins of the twelfth census of the United States : issued from October 6, 1900 to [October 20, 1902] ... number 4 [-247] → online text (page 82 of 222)