Airo-hydrogen blow-pipe, 338, 350.
Air pumps, 88.
Alchemists, 43.
Alchemy, 18.

Alkalimeter test for cyanide of potas-
sium, 601.

Alkalies as fluxes, 43.

Aikalies, metals which form, have a
tendency to unite with those which
form acids, 29.

Alkali, preparation of, for removing
grease and oil, 579.
Alloy fusible for moulds, 540.
Alloy of silver, copper and iron, 592.
Alloy of the standard measure used by
government, 203.

Alloy of zinc and mercury, 556.
Alloys, 28, 144.

Alloys and their melting heats, 334.
Alloys, cohesion of, 214.

Alloys, deposition of, 622.

Alloys, experiments with, 226.

Alloys, fusibility of, 217.

Alloys, gold, 190.

of, 210.

Alloys most used, 179.
Alloys of copper and lead, 186.
Alloys of copper and tin, 185.
Alloys of copper and zinc, 183.
Alloys of copper, zinc, tin and lead.

187.

Alloys, remarks on characters of, 210.
Alloys, separation of the constituents
of, 31.

Alloys, silver, 199.

Alloys, solution for depositing, 622.
Alloys, weighing, 215.

Aluminium, 619.

Alloys, hardness of, 30.

Alloys having specific gravity more
than the mean of their components,
207.

Alloys, having specific gravity less
than the mean of their components,
207.

Alloys, malleability and ductility of,

212.

Alloys, mixing, 222, 224.

Anti-friction cam-press, Dick's, 369
Anti-friction metal, Fenton's, 203.
Antimony, 28, 179, 180.
Antimony, curious phenomenon in de.
positing of, 622.

Antimony, deposition of, 619.
Antimony, melting of, 221.
Anvils, hardening of, 154.
Apparatus, forms of, for electrotyping,

535.

metals, 30.

594.

Arsenic, 28.

Arsenic, deposition of, 619.
Articles prepared for plating, how, 593.
Artificial and natural blasts, 50.
Atmospheric air, applications of, to fluid
metal, 69.

Atmospheric air, contact of iron with,
in purification, 21.
Atmospheric air, forcing, into the fluid
metal, 71.

Attraction of acids for metals, table of,
575.

Aurate of ammonia, 611.
Avoirdupois, table for converting de-
cimal proportions into divisions of
the pound, 216.

Axle of wheel carriages, known to
assume the crystalline state, 26.
Axletrees, hardening wrought iron, 158.

Babbitt's anti-attrition metal, 203.
Babington's battery, 517.

Ball and cross of St. Paul's Cathedral,
309.

Bright red heat, 96.
Ball, iron, 87.

Bank of England, Oldham's process of
annealing boxes containing steel
plates, 150.

Bar iron, manufacture of, 115.
Barron and Brothers' furnace, 229.
Batteries, of, 98.

Batteries, comparative constancy of
different kinds, 552.

Batteries, comparative produce, 553.
Batteries, comparative cost of, 554.
Batteries connected.against each other,
580.

Batteries, description of, 509.
Batteries, of different metals, 516.
Batteries, relative intensity of, 559.
Batteries, relative power of, 552.
Batteries, respective peculiarities of,

Battery, Smee's, 527.

Battery, solutions of, how often changed,
537.

Battery, solutions, the comparative
value of, 536.

Battery, the earth, 529.
Battery, the first, 490.

Battery, use of, separate, 505.
Battery, Wollaston's common acid, de-
fects of, 519.

Battery, Wollaston's, 518.
Battery, Wollaston's, modification, 518.
Battery, process for making solutions,
589, 611.
Bawtree, Mr., 550.
Beak irons, 287.

Bearings for locomotives, tin and pew-
ter, 235.

Belgian furnace, 41.
Belly helve, 112.
Bellows, 88.

Bellows for hand forging, 93.
Bells, casting, 267.

Bending thin metals, 288.

Berlin ornaments of iron, 275.
Bessemer's address to the British Asso-
ciation, 74.

Bessemer's apparatus, description of, 62.
Bessemer's experiments at Baxter
house, 126.

Bessemer's iron, analysis of, 71.
Bessemer's iron, fibrous stratum in, 73.
Bessemcr's iron, test of, 73.

Bessemer's modification of steam ham-
mers, 70.

Bessemer's process, hammering and
squeesing in, 73.

Bessemer's iron, extreme tenacity of, 73.
Bessemer's iron, phosphorus in, 72.
Bessemer's process, change effected in
iron by, 72.

Bessemer's process of refining iron, 22,

60.

Bessemer's process, removal of carbon
and silicon by, 72.

Bessemer's process to take advantage
of the impurities of iron uniting with
oxygen, 71.

Bessemer's squeezers, 69.
Besson's screw lathe, 443.

Best method of making silver solu-
tions, 589.

Binding screws, varieties of, 532.
Bismuth, 18, 28, 179, 181.
Bismuth, deposition of, 619.
Bits, drilling, 407.

Black leading non-metallic moulds, 505.
Black matter upon positive electrode,
520.

Black lead as a conductor, 505.

Blowing apparatus,

52.

Bruns' battle of Arbello in relievo, 316
Brushing silver off copper goods, 597.
Building up or welding, 97.

Bullet moulds, 232.

Burnishing of plated and gilded goods,

593.

Busts and figures, how made, 548.
Button metals, soldering, 333.

Buttons, manufacture of, with a fly
press, 380.

Bolts, 103-4.

Bolt screwing machine, 437.

Boiler-makers, shears for, 365.
Borax as a flux, 43.
Boring machines, 405.

Book covers electrotyped, 563.
Brace, French, 404.

Brads and nails, cut, 386.

Cadmium, depositing of, 519.

Cagniardelle, description of, 56.
Calcination and roasting, 36.

Calculating machine, axes or shafts for,

325.

541.

Brass, 225.

Brass and gun metal castings, pickling
of, 276.

Brass filings, loss in melting, 226.
Brass guns, moulding, 267.
Brass, ordinary yellow, 188.

Brass tubes for boilers of locomotives,
329.

Brass and copper, raised works
sheet, 315.

Brass and copper soldering, 331.
Brass, depositing of. 624.
Braziers' hearth, 335.

Brick dust in moulding, 241.
Bright plating, how done, 603.
Britannia metal, 224.

Britannia metal, soldering, 334.

in

Calico-printing, plates of wire, 326.
Cannon, wrought iron for, 117.
Carbon in iron, 71.

Carbon and oxygen, union of, in Besse-
mer's process, 68.
Carbonates as fluxes, 43.

Carbonic acid gas, 47.
Carbonic oxide gas, 47.
Carburetted bydrogen gas, 47.
Case-hardening, 147.

Case-hardening, wrought and cast iron,
164.

Cast-iron, advantages of, 25.

Cast and wrought iron, difference in, 21.
Cast and wrought iron, hardening, 163.
Casting brass guns, 268.

Casting equestrian and other figures,

251.

Casting figures, 249.
Cast-steel, 84, 139.

Casting and founding, 230.
Castings, patterns for, iron, 261.
Catalan trompe, 54.

Catalan trompe, action of, 55.
Catalonia trompe, used in, 54.
Cathode, cations, 509.
Cave's punch improvement, 389.
Chain blast, 55.

Chain blast, construction of, 55.
Chain blast, air-chamber of, 55.
Chains, gilt, quantity of gold required,
617.

Chains, manufacture of, 381.
Chains, welding of, 136.
Chamfered drills, 395.

Chamfering of screw-taps, 423.
Change wheels for screws, calculations
of any combination of, 451