system, 138, 144, 195, 363, 368,

445

table, comparative, 150

368

in America, 176

theorems, 14, 106

tracks, best width of, 443

works, comparative mortality at,

Railways, clearing, from obstructions, 432
Rays, polarised, power of, 320

Reading-room of British Museum, improve-
ment of, 38, 76. See British Museum,
Record commission publications, 59, 75
Reed, Mr. William, death of, 288

Reid, Dr., on ventilating, &c. the Houses of
Parliament, 28, 69, 320

Resuscitated inventions, 365, 397

Retorts, gas, Hutchison's patent, 178
", Brunton's patent, 449

Riches, how to obtain, 256

River-side fires, extinction of, 391
Roads, new mode of making, 151
Rocket-light beacons on the shores of the
Black Sea, 358

Rooke's improvements in the Jacquard loom,

Scale-plate, porcelain, 23
Screw-cutting machine, Tracey's, 376;
Heineken's, 377

Screw-drivers, short and long, 254
Scythe-sharpening, improved mode of, 174
Sea-water purifying Company, 64
Sheep, scent of inimical to weavils, 152
Ships, apparatus for unloading, 47
Shoe-pegs, machine for splitting, 151
Shoes. See Boots, &c.

Shop-bill, philosophical, 304

Siderial time for ascertaining ships' place,
244, 293

Signal-lantern, ship's, 96

Slate furniture, &c., manufacture, 231, 254
Slate quarries, Kirkby, 56

Sloane, Sir Hans, founder of the British
Museum, 259

Steam-boiler explosions, Report of Franklin
Institute on, continued

experiments on the conversion of water
into steam by heated metal, 98
injection of water into intensely heated
steam, 99

steam surcharged with heat, 102
plates of fusible alloys, 103

fusing points of alloys applicable to steam-
boilers, 119

vaporisation of water by copper, 123

iron, 162
considerable quantities

of water in copper, 165; iron, 168
ditto, larger quantities of water, 171
stationary temperature of alcohol on heated
metals, 173

the production of permanently elastic
fluid by intensely heated metal, 186
sort of bursting produced by gradual
pressure within cylinders of iron and
copper, 207

Perkins's experiments, 209

construction and graduation of the safety.
valve, 211

performance of the safety-valve, 212
effect of deposits in boilers, 215

elastic force of steam at working pres-
sures, 215

Steam-carriages on common roads, Hancock's,
95, 111, 128, 191, 199, 433

Sir Charles Dance's, 111

Mr. Gurney's, 111, 199
tolls' bill, 199, 335

Steam-engine, early working in Cornwall, 3
-, work, Cornish, 3, 136, 269,

Steam-vessel, iron, 192

for canal tunnels, 257
--, miniature, 272
"Novelty," 363

wheel, Jones's mercurial, 312, 341
Stephenson, Robert, Esq., on the power of
locomotives on level and inclines, 245
Stirling's ornamental slate works, 231
Stevens's improved fountain inkstands, 220
Stone, artificial, Clinton's, 191
Stone-planing machine, Hunter's, 79
Stoves for burning Anthracite, 45, 126
Dr. Arnott's, 320, and see Anthracite.
Street water-posts' handle, 378
Submarine apparatus, Kemp's, 96
Atkinson and Hale's,

399

lubrication by, 364, 390, 397

hard, mode of rendering soft, 432

gauge, glass, 87

posts, street, handle for, 378

power, new application of, 255

and steam power, comparison be--
tween, 290

wheels, velocity of, at night, 192
Watt's steam-engine work, 3, 136, 269, 340,
363

Weekes's, Mr. W. H., observations on the
eclipse of the sun, 283

Wheels for railway-carriages, Tier's, 398
Wind, constant currents of, 462
Windmill, Symington's horizontal, 273
Window-sash, improved, 42
Wire for piano-strings, best, 68, 38
plate engraving, 446

Wood-polishing, 240

--, embossing on, 368
Wool, cleaning, 125

carding machine doffer, improved, 255
Woolf's high-pressure engine, &

X.

Xylographic cheque-plates, 47

Z.

Zinc, properties of, 202