INDEX. France, state of the arts in, 272 Hansom's new safety-cab, 59 467 Hearing, Webster's instrument for assisting, Heat, polarisation of, 48 Heating the elephant's house at the Zoologi- Heaton's brick-making machine, 282 Hogs, scent of, inimical to weavils, 152 House-burning system, the, 411 Hunter's stone-planing machine, 79 tent retort-bed, 177 Hydrogen in vegetation, 141 introduction of salmon into the Hydraulic power-apparatus, Hale's, 146 Hydraulics, experiments in, 35 Jopling's, Mr. Joseph, railway hints, 43; K. Kiln, improved charcoal, 401 Kirkby slate quarries, 56 Klaproth's experiments on the generation of L. Ladies' marine life-preserver, 135, 298 safety, Davy's and Upton and Ro- Laplace, monument to, 240 mine, Sampson, Twigg, and Co.'s, 112 Life-boat, new, 224 preserver, ladies, 135, 238- Lighthouses, metallic, Capt. Brown's, 318 the Black Sea, 357 Liquor-gauge, Fage's, 80 Locomotion. See Steam Locomotives. M. Macerone, Colonel; improved mode of improved paddle- wheel, 33; on the practicability of aerial Magnetic balance, 464 Magneto-electric apparatus, 311 Manumotive-carriage, 464 Manuscripts in British Museum, 39 Mechanics' Magazine, German, 240 &c., new mode of taking casts from, 432 steam safety-pipe and gauge, 41 Metallic lighthouses, Capt. Brown's, 318 Metals, ductility and malleability of vari Meteo ological Society of London, 384 Mincing-machine, meat, 46 Minerals, change in the chemical character , production of artificial, by gai- Mining, on the long-work system of, 108 Moon, siderial and tropical periods of the, Mordan's triple-pens, 111, 153, 231 Pen, triple-pointed, 111, 153, 231 INDEX. Perkin's experiments on generating steam, Phrenology in France, 352 Physics, Mr. Exley's new theory of, 418 Pianofortes, mode of tuning, 67 Pickworth's patent paddle-wheel, 321, 356 Polishing wood, 240 469.. in America, 176 table, comparative, 150 system, 138, 144, 195, 363,368, Powers, new, 143, 146, 336 445 Presgrave's, Major, iron suspension bridge in India, 50 Printing apparatus, rotary, Mr. Rowland Hill's, 271, 379 Printing for the blind, 304 Propert, Mr. J., evidence of, against railway 368 theorems, 14, 106 tracks, best width of, 443 works, comparative mortality at, Railways, clearing, from obstructions, 432 Reading-room of British Museum, improve- Reid, Dr., on ventilating, &c. the Houses of Resuscitated inventions, 365, 397 Riches, how to obtain, 256 River side fires, extinction of, 391 Rooke's improvements in the Jacquard loom, 17 Russia, railroads in, 432, 464 S. Safety-lamp, inefficacy of, 108 -, Davy's and Upton and Roberts', 390, 442 -, experiments relative to the, 211 Sagar iron suspension bridge, 49 Saw-mill saw, improved, 152 Sayer, Dr., evidence against railway tun- Scale, new mathematical division of the Scale-plate, porcelain, 23 Screw-drivers, short and long, 254 Shop-bill, philosophical, 304 Siderial time for ascertaining ships' place, Signal-lantern, ship's, 96 Slate furniture, &c., manufacture, 231, 254 Sloane, Sir Hans, founder of the British Soap, olive oil, 23 -, Silica, 228 -, substitute for, in linen washing, 80, Sound, principles of, 69 Sounding instrument, Ericsson's patent, 353, Steam-boiler explosions, Report of Franklin experiments on the conversion of water steam surcharged with heat, 102 fusing points of alloys applicable to steam- vaporisation of water by copper, 123 iron, 162 of water in copper, 165; iron, 168 the production of permanently elastic Perkins's experiments, 209 construction and graduation of the safety- performance of the safety-valve, 212 elastic force of steam at working pres- Steam-carriages on common roads, Hancock's, Sir Charles Dance's, 111 Steam-engine, early working in Cornwall, 3 |