towards Deville, 32

Acetic acid, action of, on alu-
minium, 78

Acid, acetic, action of, on alu-
minium, 78

hydrochloric, action of, on
aluminium, 75
muriatic, action of, on alu-
minium, 75

nitric, action of, on alu-
minium, 75

sulphuric, action of, on alu-
minium, 74

tartaric, action of, on alu-
minium, 78

Acids, organic, action of, on alu-
minium, 78

Air, action of, on aluminium,
70

Albite, formula of, 43

Alkalies, caustic, action of, on
aluminium, 77

Alkaline carbonates, action of,
on aluminium, 88

Alloys, aluminium, made by
Cowles Bros., 205

of aluminium, 258-303

and antimony, 292
and bismuth, 292
and boron, 299.
and cadmium, 299

and carbon, 300

and copper, 264

and gold, 298

and gallium, 300

and iron, 280

and lead, 291

and manganese, 302

cury, 261

and molybdenum, 302
and nickel, 293
and nitrogen, 303
and platinum, 299
and silicon, 259
and silver, 295
and sodium, 303
and tin, 289
and titanum, 301
and tungsten, 302
and zinc, 287
with steel, 281

of brass and aluminium, 276
of German silver and alu-
minium, 277

Alumina, composition of, pre-
cipitated, 165

crucibles, use of, for obtain-
ing aluminium, 228
in purifying alumin-
ium, 243

extracted from alum stone
or shale, 153

manufacture of, 144-153
manufactured from cryolite,
146-153

dry way, 146

wet way, 152

precipitation of, by carbonic
acid gas, 149

reduction of, by carbon in
presence of copper, 309
sulphate of, Tilghman's pro-
cess for decomposing, 144
Aluminate of soda crucibles, use
of, in purifying alu-
minium, 243

by Löwig, 151

precipitation of, at Sal-
indres, 159, 163

Aluminite, formula of, 44
Aluminium, alloys of, 258-303
amalgam, properties of, 263
bronze, solders for, 279
chemical properties of, 70-
89

Crown Metal Co.'s, 173

makers of alumin-

ium bronze, 274

crucibles, use of, for obtain-
ing aluminium, 228
history of, 25-42

manufacture at Salindres
(Gard), 158-171

metallurgy of, 90-257
occurrence in nature, 43-50
physical properties of, 51-70
plate as a substitute for tin
plate, 247

protoxide, 26

than sodium, 180

silver, 297

sodium, double chloride,
making of, 154-157

uses of, 243-247
working in, 235-257
Alum-shale, use of, for making
alumina, 153

Alum-stone, use of, for making
alumina, 153

Alums, native, impurities in, 45
Alunite, formula of, 44
Amalgam, potassium, used in
isolating aluminium, 25
Amalgamation of aluminium,
261, 308

Wöhler's efforts, 25
American aluminium, 306
Co., Detroit, 221
price of, 1883-84, 39

cryolite, 48
Amfreville-la-mi-Voie,

alumin-

ium works at, 29, 33
process used at, 124

Ammonia, aqua, action of, on
aluminium, 78
Analyses of beauxite, 46

Beauxite, formula of, 44

treatment of, at Salindres,
160

where principally found in
France, 160

Bekétoff, on the action of oxide
of barium on aluminium, 87
Bell Bros., directions for solder-
ing aluminium, 252
makers of aluminium at
Newcastle-on-Tyne, 33
stoppage of their alu-
minium works, 35
Bells, aluminium, 63
Benjamin, Mr., additional details
of Castner's sodium process,
141

Benzine, use of, in melting alu-
minium, 236

Benzon, iron process of, 211
Berlin, aluminium works in, 35
Bertrand, M. A., deposition of
aluminium by electricity, 232
Berzelius, investigation on the
composition of cryolite, 104
Bessemer converter, reduction of
aluminium in the, 207
reduction of sodium and
potassium in, 208
Birmingham, England, Webster's
aluminium works at, 36
Bismuth, alloys of aluminium
with, 292

Blast furnace, reduction of alu-
minium in a, 185-204
Books on aluminium, Tissier
Bros., 28
Deville's, 29
Mierzinski's, 29

Borates, action of, on aluminium,
84

Boron, alloys of aluminium with,
299

Boudaret, M., report on the mal-
leability of aluminium bronze,
267

Bourbouze, M., on an aluminium
tin alloy, 290
Brass, aluminium, strength of,

276

compared with aluminium
bronze, 271

Braun, John, deposition of alu-
minium by electricity, 233
Bremen, aluminium works at,
229

Bromide of aluminium used for

making pure aluminium, 243
Bromine, action on aluminium, 88
Bronze, aluminium, 264

a true alloy, 265

compared with brass, 271
compressive strength of,
272

Cowles Bros., 274

first exhibited at Paris,
1867, 34
making of, 267
malleability of, 267
manufactured by M.
Evrard, 211
melting point of, 271
phosphorized, 279

price in 1878, by the So-
ciété Anonyme, 36
production in the United
States in 1885, 327
specific gravity of, 271
tenacity of, 266, 267, 270,
276
silicon-aluminium, 205,280
silicon, manufactured by M.
Evrard, 211

Brünner, reduction of sodium by,
131

Buchner, G., purification of alu-
minium from silicon, by, 243
Buff and Wöhler on the solution
siliceous aluminium, 260
Bunsen and Deville's electrolytic
method of separating alumin-
ium, 41

Bunsen, electrical process of, for
depositing aluminium, 222, 225
Burnishing of aluminium, 55

Cadmium, alloys of aluminium
with, 299

Caillet, on the amalgamation of
aluminium, 261
Calcination furnace for sodium
mixture, 133
Thomson's, for cryolite,
146

Calcination retorts for alumi-
nium-sodium chloride at Sa-
lindres, 166

Calcutta, aluminium at the ex-
hibition of, in 1883, 246
Calvert and Johnson, making of
iron aluminium alloys,

282

reduction of aluminium
by iron, 209
Camden, N. J., aluminium made

at, 31
Carbon, action on aluminium, 88
alloys of aluminium with,
300

and aluminium, alloy of, 203
and carbon dioxide, reduc-
tion of aluminium by, 187
as lining for earthen cruci-
bles, 36

changed to graphite, 193
dioxide and carbon, reduc-

tion of aluminium by, 187
disulphide, use of, for making
aluminium chlo-
ride, 317

for making alumin-
ium sulphide, 310
reduction of aluminium by,
188-206
Carbonates of alkalies, action on
aluminium, 88

Carbonic acid gas, lime-kiln for
producing, 150
used for precipitat-
ing aluminium,
149, 163

Carburetted hydrogen, reduction
of aluminium by, 182
Casting of aluminium, 237
its importance, 36
the largest ever
made, 39

Castings, Mitis, alloy used for
making, 212
Castner, claims made in his pat-
ent, 141

process for reducing sodium
by, 324

reduction of sodium by, 131
Chalk, object of using, in the
reduction of sodium, 133

Christofle, M., castings of alu-
minium bronze, 265
gilding of aluminium, 80
on soldering aluminium, 248
on the use of aluminium-
silver alloy, 296
Classification, chemical, of alu-
minium, 88

Clay, cryolite, as lining for

earthen crucibles, 36
Clays, alumina the base of, 43
Cleaning of tarnished alumin-
ium, 54

Cleveland, manufacture of alu-
minium in, 41, 190

Coating of metals with alumin-
ium, 231

iron with aluminium, 247
Coins, use of aluminium for,
247

Color of aluminium, 53
Combinations of aluminium, 43
Combustion of aluminium leaf,

71