THE

MECHANICS' MAGAZINE,

MUSEUM,

Begister, Journal,

AND

GAZETTE,

DECEMBER 25TH JUNE 24th, 1848.

EDITED BY J. C. ROBERTSON.

VOL. XLVIII,

"Objects of utility, not amusement, are now the things which command the attention of the scientific
world. The metaphysicians of old occupied themselves in discussing the possibility of two spirits occupy-
ing the same place in the same space of time, or the divisibility of spirit. The philosophers of the present
age confine themselves to the divisibility of matter—what they can see with their eyes, hear with their
ears, and handle with their hands. The spirit of investigation now directed in a right manner in the true
Baconian spirit-traces effects to their causes, and never looks upon a result as worthy of consideration,
unless the world in some manner is benefited ; and the world now, embraces not only princes and patri-
cians, but also mechanics and artizans."-PORTER.

LONDON:

ROBERTSON AND CO.,
MECHANICS' MAGAZINE OFFICE, No. 166, FLEET-STREET.

AGENTS: FOR EDINBURGH, J. SUTHERLAND;
GLASGOW, W. R. M'PHUN, AND DAVID ROBERTSON;
DUBLIN, MACHIN AND CO., 8, D'OLIER STREET ;
PARIS, A. & W. GALIGNANI, RUE VIVIENNE;

HAMBURGH, W. CAMPBELL.

1848.

LITRARY
UNIVEin ri CIFORNIA

PRINTED AND PUBLISHED BY J. C. ROBERTSON, 166, PLEET STREET.

INDEX

TO THE FORTY-EIGHTH VOLUME.

Accordions, 141

Atmospheric resistance, law of, Bichromate of potash, Jaquelain's
Achromatic lenses, double, 69, 93 31, 198, 291

economical process of making,
Acid carbonic, liquid, 237

railway system, 285 428
-, sulphuric, 165

Aurora Borealis seen at Cambridge, Biram's improved tell-tale, 121
Adcock's spray pump. 45, 92, 130 Messrs. Morgan and Barber's Birkmyre's patent improvements
Aëronautic machine, Ruijter's, 333 account of, 546

in smelting copper and other
Agrometers, Godfray's, 169 Australia, introduction of steam

ores, 500
Air streams of the Puna, 319 navigation into, 103

Bishop's patent boom-derricks, 90
Air-tight cases and jars, 498 Austria, introduction of steam Bit, expanding rose, 420
Airy's (Professor) wave theory, navigation into, 141

Blackfriars-bridge, erroneous state-
578

Axle, railway carriage, grease, 526 ment respecting, 429
Alarms, Rutter's patent, 36 Ayre's (Dr.) patent manure ma Bland's plan for the suppression of
Algebraic equations, Notes on the nufacturing process and appa spontaneous combustion on
theory of, by James Cockle, Esq. ratus, 5

board of ships, 273
M.A., Barrister-at-Law, 230, 511,

Bleaching, Sandeman's patent cold
537, 605

Babbage's, Mr., pet post-bags in and thermal processes of, 162
on the general
1831, 275

Blowpipe, workshop, Sir John
solution of, by Professor Young, Baddeley, Mr. W., on gas-fittings, Robison's, 46
101
136

Herapath's universal
Algebraicæ, Horæ, by James Cockle, Baker's “Railway Engineering,” coal gas, 416
Esq. M.A., 19, 181

(review) 133, 165

Bodies, Boutigny's spheroidal state
Allen and Noyes's patent stuffing- Bakewell's copying telegraph, 391 of, 299
boxes, 116

Ballancing the wheels of locomo -, falling, deviation of from
American patents, recent, 92, 115, tive engines, Heaton's plan of.596 the perpendicular, 485, 488
522, 548
Ball cock, Tidd's improved, 140

, weights and specific gravi-
law case, sculpturing by Balloon, Archimedean, 553

ties of, instrument for ascertain-
machinery, 89

Ball's portable suspending revolv. ing, 558
Washburn U.
ing oven, 132

Boiler incrustations, 46
Gould, 356
Bank's steel tires, 468

-, steam, Craddock's patent,
→ pork trade, 468

Bar iron, Melling's machine for 449
steamers, 597
twisting, 98

Bolt, Steiger's spiral, 138
-, telescopes, 347

tapering, 141

Boom-derricks, Bishop's patent, 90
American patent system, Report Barlow's hollow piston steam. Boot crimping-tool, Taylor's, 525
of the Commissioners of Patents engine, 524

Boring cylinder machine, Beyer's,
for 1848, 612
Barometer, fountain, 286

232
Anastatic printing, 189
Barber, John T., Esq., on the

and sinking machinery,
Analytical and geometrical studies, coming comet, 186, 235; elec Gard's patent, 433

comparative advantages of, 825, tricity of excited paper, 203 Boswell's ydro-pneumatic ele-
337
Battery, new galvanic, 237

vator, 345
geometry, chapters on, Grove's, new exciting fluid Boutigny's definition of the sphe-
by Jaines Cockle, Esq. M.A., 82, for, 300

roidal siate of bodies, 299
102
Bay-leaf teeth, 237

Boutigny and Hutins' process of
trigonometry, easy in- Beams and girders, iron; Dredge's preserving wood, 498.
vestigation for a general theorem improvements, 8; Fielder's, 477. Bowman, R. Esq., on the strength

in, by Professor Young, 367 Bache, De la Sir Henry,and Dr. Lyon of iron chilled and unchilled,
Annandale's plan for extinguishing Playfair, first report by, on coals 85
fires, 139

suited to the royal steam navy, Boura's patent colour-extracting
Antimony, white paint from, 285 304, 322, 350, 36%, 402, 418

apparatus, 211
Archimedian balloon, Pitter's, 553 Becquerel's new method of bronz- Braiding, 429
, screw, 237
ing, 349

Bramah, the inventor of the hy.
Armstrong's hydraulic engine, 597 Belgian patent law, radical reform draulic telegraph, 321
Ark, the, 237

of, 78

Bread, how to prevent sourness
Articles of utility, registered Bentham, Sir Samuel; plans for in, 11

designs for, 23, 71, 94, 118, 142, seasoning and drying timber, Breakwater, Plymouth, Historical.
166, 190, 214, 238, 262, 286, 310, 226 ; on naval construction, 507, Practical, and Theoretical ac-
334, 35, 381, 406, 454, 478, 502, 530

count of, by Sir John Rennie
526, 550, 574, 598, 622

Bentley, Mr. C.; simple compen (review) 421
Atkin's cupper's horizontal scari sating pendulum, 420; ignition Bridges, Dredge's fron, 622
fier, 54
of spongy platinum, 150

Blackfriars, 429
Atrnosphere, height and tempera- Beyer's cylinder boring machine, -, Conway tubular, 117, 255
ture of, 266
232

iron, Sunderland, 116