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 Reading-room of British Museum, improve- Reid, Dr., on ventilating, &c. the Houses of Resuscitated inventions, 365, 397 Retorts, gas, Hutchison's patent, 178 Riches, how to obtain, 256 River-side fires, extinction of, 391 Rooke's improvements in the Jacquard loom, 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 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 Mr. Gurney's, 111, 199 Steam-engine, early working in Cornwall, 3 Steam-vessel, iron, 192 for canal tunnels, 257 wheel, Jones's mercurial, 312, 341 399 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-- wheels, velocity of, at night, 192 Weekes's, Mr. W. H., observations on the Wheels for railway-carriages, Tier's, 398 Wood-polishing, 240 --, embossing on, 368 carding machine doffer, improved, 255 X. Xylographic cheque-plates, 47 Z. Zinc, properties of, 202 |