Discoveries and Inventions of the Nineteenth Century

Angle, limiting, or critical, 399. Aniline, 787. black, 793. blue, 790. green, 791. purple, 788. Anomalous magnetisation, 538. Anthea Cereus, 678. Anthracene, 796, 797. Applegath printing machine, 312. and Cowper, ditto, 308. Apps’s anemometer, 656. induction coil, 506. Aquaria, 675. Arago, 599. Architecture, use of iron in, 72. Argand gas burners, 773. lamps, 595. Armours, ships’, strengths of, 166. Armstrong 110–ton gun, 202. Armstrong’s guns, 192. hydraulic crane, 333. Atoms, 733, 743. Aurora, 504. Australian gold, 688. Austrian torpedoes, 229. “Automobile” competition, 23. Axolotl, 686. B. Bacon, Francis, 799. Balloon, photographic, 628. Basic process (Gilchrist’s), 66. Battery, galvanic, 493. 814Battery, secondary, 530. Baxter House experiments, 58. Bell Rock Lighthouse, 593. Bells, electro-magnetic, 554. Benzol, 783. Bessemer, 26, 56. Channel steamer, 142. converter, 63. iron, 62. process, 64. steel, 56–67. Big Wheels, 81. Bitter Lakes, 261. Blanchard lathe, the, 86. Blast furnace, 40. Blind spot in eye, 460. Blister steel, 54. Blood spectra, 431. Boilers of steam engines, 13. Boring for coals, 361. Bourdon’s pressure gauge, 12. Bourseul, M., 582. Box girders, 280. Breakwater, 258. Breakwaters for Suez Canal, 258. Breech-loading rifles, 182. Brewster, Sir D., 405, 420, 470, 474. Bridge, projected Channel, 296. Bridgewater Canal, 250, 266. Brighton Aquarium, 682. Britannia Bridge, 280. raising tubes, 336. British Aluminium Co., 723. British navy in 1894, 167. Brooklyn Bridge, 303. “Brown Bess,” 178. Browning’s micro-spectroscopes, 434. spectroscope, 422, 432. Brunel, 283. Brunswick rifle, 180. Brush dynamo, 522. Bullet, Greener’s expanding, 182. Lebel, 188. Minié, 180. Bullets, machinery for making, 330. Bunsen and Kirchhoff, 422. and Roscoe, 720. Bunsen’s battery, 496. burner, 421. Bye-products in gas making, 772. C. Cable railways, 126. Cæsium, 426. 815Caissons for Forth Bridge, 293. Calais-Douvres, steamship, 141. Caledonian Canal, 250. Calico printing machines, 321. California, discovery of gold in, 688. Camera, 613. Canal, Caledonian, 250. Manchester Ship, 262. Nicaragua, 274. North Sea, 271. Panama, 272. Suez, 251. Cantilever Bridges, 291. “Cape Horn,” 120. Captain, H.M.S., 141. Carbon transmitter, 590. Carbonic oxide, 44, 48. Carbons for arc lights, 527. Carcel lamp, 597. Carpenter, Dr. W. B., 462. Carriages, railway, 111. for rock drills, 358. Carriers in pneumatic tubes, 344. Cars, Pullman, 112. Castalia, steamship, 139. Cast-iron, composition of, 43. Cast steel, 54. Catoptric lighthouse apparatus, 599. Cause of light and colour, 408. Celestial chemistry and physics, 436. Celluloid, 622. Central Telegraph Office, London, 574. Centres of gravity and buoyancy, 149. Centrifugal force, 107. Chains, 330. Chain-testing machine, 329. Channel Bridge (projected), 296. steamers, 142. Channel Tunnel, 364. Chassepot rifle, 182. Chemical action of light, 608. equations, 734. nomenclature, 782. symbols, 733. work of electricity, 497. Chloroform, 608. Chromatic aberration of eye, 462. Chromo-lithography, 638. Chronograph} Chronoscope} electric, 656. Cincinnati Suspension Bridge, 287. City of Rome, steamship, 139. Clark’s hydraulic lift graving dock, 331. Clarke’s magneto-electric machine, 509. Clay process, stereotyping by, 633. Clerk Maxwell’s theory of light, 541. “Clermont,” the, 147. Clifton Suspension Bridge, near Bristol, 285. Niagara, 287. Coal, 751. Coal in Kent, 371. Coal-gas, 764. Coal-tar colours, 781. Code, telegraphic, of American War Department, 528. Morse’s, 560. Wheatstone’s dot, 565. Cold-short iron, 62. Colesberg, 703. Collodion process, 618. Colour printing, 639. Colours not in the objects, 413. photography of, 628. Comets, spectra of, 444. 816Composition rollers, 406. Condie’s steam-hammer, 28. Copying principle, 86. Cordite, 748. Corona, 438. Cort’s puddling furnace, 45. Couple, mechanical, 149. Cramp gauge, 129. Croll, on Stellar Evolution, 810. Crookes, 507. Crystal Palace, an example of use of iron in architecture, 72. Crystal Palace, 72. Aquarium, 677. Crystalline lens, 455. Cup and cone, 49. Current, electric, 492. induced, 502. measurement of, 536. Currents in submarine cables, 579. D. Daguerre, 609. Daguerreotype, 610. Daimler motor, 24. Dallmeyer, 617. Daniell’s battery, 495. De Beers Mines, 707. Delphi, oracle at, 739. Dial telegraphs, 566. Diamond cutting, 700. Diamond, qualities of the, 698. rock drill, 359. Diamondiferous, 703. Diamonds, 696. use of, 701. Dioptric lighthouse apparatus, 600. Discoveries, progressive, 802. Dissipation of energy, 808. Distinct vision, 458. D lines of sodium spectrum, 425, 441. Dolls, talking, 674. Domestic consumption of coal, 755, 756. Double refraction and polarization, 399. Dredges, Suez Canal, 255. Drilling machine, 90. Dry digging, 702. Duboscq’s electric lamp, 497. Du Moncel, 590. Dynamical electricity, 490. Dynamo, Siemens’, 522. Brush, 522. E. Earl’s Court, Great Wheel at, 83. Earth’s circuit, 574. Ebonite, 728. Eccentric, 9. Eclipse of sun, 438. Eddystone lighthouse, 594. Edison, 669, 670, 674. Edison’s kinetoscope, 478. Eiffel Tower, the, 72. Electric lighting and electric power, 519. Electric current, 790. furnace, 722. Electric induction, 488. launch, 534. light, cost of, 43. 817Electric light in lighthouses, 515. telegraph, 598. torpedo, 547. tramway, 532. welding, 537. Electricity, 481. Electricity, the new, 538. Electrode, 497. Electro-magnet, 500. Electromotive force, 494. Electro-plating, 499, 518. Electrotyping, 634. Elementary bodies, 716. Elementary phenomena of magnetism and electricity, 483. Elswick 4·7–in. gun, 206. guns, 194. Energy, 806. Ether, 735. the luminiferous, 408. Exhaustion of coal, 755, 756, 757. Expansive working of steam, 8, 17. Explosion by concussion, 745. of locomotive, 21. of torpedoes, 229. Explosives, 225, 740. different effects of, 748. names and classes of, 750. Eye, the, 451. dimensions of some parts of, 462. Eye not optically perfect, 462. Eyeballs, muscles of, 461. F. Fairbairn, Sir W., 280. Faraday, 506, 508, 735. ventilating gas-burner, 773. Faure’s accumulator, 530. Fellahs, 255. Ferris wheel, Chicago, 81. Field telegraphs, 555. Fire-arms, 169. Fish-plates, 105. Fizeau, 386. Floating matter in air, 383. Fluids, electric, 487. Fly-wheels, 7. Force, conservation of, 804. electromotive, 494. Forth Bridge, the, 311. Foucault, 387. Fovea centralis, 456, 457. Fraser-Woolwich guns, 195. Fraunhofer’s lines, 420, 436. Fresnel’s mirrors, 409. measurement of velocity of light, 600. Fribourg Suspension Bridge, 286. Froment’s dial telegraph, 567. Furnace, electric, 322. G. Galvanic batteries, 493, 494. Galvanometer, 493. mirror, 570. Gas engine, 25. governor, 769. holder, 766. making apparatus, 765. meters, 775. pressure, 769. retorts, 766. 818Gases of blast furnace, 49. Gatling battery gun, or mitrailleur, 219. Gauge, broad and narrow, 106. Bourdon’s pressure, 12. Geissler’s tubes, 505. Ghost, Pepper’s, 392. Giffard’s injector, 11. Girder bridges, 280. Glass, strains in, 407. Glatton, H. M. S., 161. Glynde, electric railway, 534. Gold, 686. Gold and diamonds, 687. Gold-mining operations, 690. Goodyear, Mr., 727. Governor of steam engines, 6. Gower Street Station, 114. Gramme magneto-electric machine, the, 511. Graphophone, 672. Graphotype, 644. Gray, 590. Great Brooklyn Bridge, 303. Great Eastern, 133, 152, 330, 465, 578. Greatest Discovery of the Age, 801. Greener’s expanding bullet, 182. Grove, Sir W. R., 804. Grove’s battery, 495. Gun, 32–pounder, 191. 68–pounder, 192. 35–ton, 201. 81–ton, 201. 100–ton, 201. 110–ton, 202. Elswick 4·7–in., 206. Maxim, 225. Moncrieff, 208. Nordenfelt, 223. Gun-cotton, 747. torpedoes, 233. Gunpowder, 734. Guns, Armstrong’s, 192. Elswick, 194. Fraser-Woolwich, 195. Krupp’s, 214. quick-firing, 206. submarine, 240. Gutta-percha, 728. H. Half-tone process, 629. Hancock, Mr. Charles, 729. Mr. Thomas, 725. Harvey’s torpedoes, 234. Heat produced by electric current, 502. Heat spectrum, 613. Heating by gas, 776. Helmholtz, 462, 464, 472, 474. Henry, on Leyden jar discharge, 538. Hercules, H.M.S., 150. Hertz, Professor, 541. Hippocampus, 664. Hoe’s printing machines, 316, 318. Holmes’ magneto-electric machine, 520. Holophotal light, 604. Holyhead and Kingston steamers, 136. Horseless carriages (Automobiles), 23. Horse-power, 10. Hot-blast, 48. Hotchkiss quick-firing guns, 208. Hough’s metereograph, 654. Howitzers, 213. Hudson River steam navigation, 147. 819Hughes’ printing telegraph, 560. microphone, 590. Hydraulic power, 324. I. Iceland spar, 399. Illuminating power of gas, 774. Illusion by movement of eye, 475. by persistence of vision, 476. stage, 290. Images formed by lenses, 399, 616. Impact theory of Stellar Evolution, 718. Incandescent electric light, 528. Incandescent gas-burners, 777. Inclined railways, 125. Inconstant, H.M.S., 152. India-rubber, 724. India-rubber and gutta-percha, 724. Indicator, 9. Induced currents, 502. Induction coils, 503. Injector, Giffard’s, 11. Instantaneous photography, 623. Introduction, 1. Iron, 29. Iron bridges, 276. Iron in architecture, 72. Iron, cast, 40. chemical changes of, 34. lighthouses, 596. meteoric, 32. ores, 39. pig, 40. ships, 133. smelting, 39. utility of, 30. wrought, 47. Ismaïlia, 260. J. Jablochkoff’s electric candle, 525. Jackson, 551. Jacobi, 531. Jamin’s magnet, 513. Johannesburg, 694. Joule, 804, 805. Joy’s valve gear, 20. Jupiter, 384. K. Kaleidoscope, 389. Karoos, 705. Kimberley, 705. Kinetographic theatre, 479. Kinetoscope, 478. Kirchhoff, 422. Klondyke, 692. König or Kaiser Wilhelm, ironclad, 164. König’s printing machine, 308. Krupp’s guns, 214. steel, 55. works, 56. L. Lake Timsah, 260. Lathe at Woolwich, 198. 820Lathe, Blanchard, 96. screw-cutting, 87. Lap of slide-valve, 9. Lebel rifle, 188. Lens, formation of image by, 616. in steps, 600. photographic, 616. Lepidosiren, 685. Letterpress printing, 306. Leyden jar, 490. discharge, 538. Light, 380. electric, 497. invisible, 383. Lighthouses, 593. Limiting angle, 399. Link motion, 16. Linotype, the, 645. Lithium, 425. Lithography, 636. Liverpool and Manchester Railway, 14. Lock-gates, 267. Locks in Manchester Ship Canal, 264, 266. Locomotive, the, 14. balancing of, 20. compound, 18. Lodge, Professor O., 540. M. Machine-guns, 218. Madder, 796. Magazine rifles, 187. Magnesium, 720. Magnetic field, 537. Magnetism produced by current, 500. Magneto-electric machines, 496, 507, 508. Magneto-electricity, 506. Mallet’s Mortars, 212. Malus, 405. Manchester Ship Canal, 262. Manganese, 43. Manhattan Life Insurance buildings, 78. Mannlicher rifle, 187, 189. Manufacturing v. making, 85. Map, Channel Tunnel, 364. Manchester Ship Canal, 263. North Sea Canal, 271. Pacific Railway, 117. St. Gothard Railway, 372. Suez Canal, 256. Tower Bridge, etc., 299. Marconi, 546. Martini-Henry rifle, 184. Mary Powell, the, 148. Matter indestructible, 576. Mauser rifle, 187, 188. Maxim gun, 225. Measuring machines, 88. Mélinite, 748. Menai Straits bridges, 280, 284. Meteoric iron, 32. Meteorites, 30. Meteorology, importance of, 664. Metereographs, 654. Meters, gas, 775. Metropolitan Railway, the, 114. Microphone, 481. Minié bullet, 180. Mineral combustibles, 751. Mines, submarine, 241. Mirror, galvanometer, 570. Mirrors, plane, 388. 821Mirrors, illusions, 391–395. Mitrailleur, 218. Molecules, 733, 743. Monarch, H.M.S., 156. Moncrieff’s gun carriages, 208. Mont Cenis Tunnel, 351. Montigny mitrailleur, 222. Morse’s code, 560. instruments, 558. plate, 562. telegraphic line, 556. transmitting key, 561. Mortar, Mallet’s, 212. Mount Washington Inclined Railway, 125. Musical sound, 666. N. Naphthaline, 669. Napier’s platen machine, 321. Nasmyth’s steam hammer, 26. Nature knowledge, 1. printing, 640. Nebulæ, 626. Needle telegraphs, 553. Negretti and Zambra’s recording thermometer, 659. New metals, 714. New York, the, 148. Newton’s prism experiment, 418. Niagara Suspension Bridge, 287. Falls, 537. Nicaragua Canal, 274. Nichol’s prism, 403. Niepce, J. N., 609. de Saint-Victor, 611, 615. Nitro-benzol, 784. Nitrogen and oxygen compounds, 732. Nitro-glycerine, 734. Nordenfelt gun, 223. North Sea Canal, 271. Note A—Production of coal, 812. Note B—Conservation of energy, 812. O. Œrsted’s experiments, 548. Oil springs, 760. Oldbury, manufacture of aluminium, 722. Ophthalmoscope, 423. Optical apparatus of lighthouses, 598. Orders of lighthouse apparatus, 602. Organic bodies, 798. Oscillating engines, 14 P. Pacific Railway, the, 116. Paddle-wheels, 130. Page, Mr., 532. Panama Canal, 272. Papier-maché stereotype process, 633. Paraffin, 761. oils, 762, 763. Parallel motion, 8. Paris Exhibition, buildings of, 76. Pascal’s principle, 325. Pattern printing, 321. Pepper, J. H., 392, 393, 505. Percussion cap, 180. Petroleum, 757. Phenakistiscope, 476. 822Phenomena of light, some, 382. Phonautograph, 666. Phonograph, 665. Photographic camera, 615. Photography, 607. Photography, celestial, 636. in colours, 614, 630. in the dark, 613. X-Ray, 447. Photolithography, 644. Photozincography, 644. Pig iron, 40. Planes, Whitworth’s, 94. Planets, photographs of, 636. Planing machines, 92. Plants in coal measures, 753. Plaster of Paris, stereotype process, 633. Pneumatic dispatch, 340. force, 333. Pniel, 701. Points, railway, 108. Polariscope, 405. Polarizer, 403. Polytechnic institution, Regent Street, 505. Portable engines, 24. Portable telegraphic instruments, 556. Portrait, Davy, 714. Helmholtz, 452. Joule, 789. Kirchhoff, 416. Lesseps, 249. Morse, 547. Senefelder, 632. Simpson, 731. Tesla, 572. Thomson, 481. Watt, 3. Whitworth, 85. Port Saïd, 257. Post-office railway van, 111. Potassium, 715. Powder, smokeless, 748. Power, horse, 10. hydraulic, 324. of steam engine, 9. of locomotive, 21. Powers, mechanical, 32. Pressure gauge, 12. transmitted in fluids, 324. Principle, the copying, 86. of the cantilever, 291. Printing machines, 305. processes, 632. telegraphs, 570. Process blocks, 629. Progress of mankind, 2. Projectiles, 166. air’s resistance to, 175. deviation, 199. long range of Whitworth, 193. speed of, measured, 659. trajectory of, 174. Propagation of sound, 668. Prospecting, 361. Proteus anguinus, 684. the modern, 807. Pseudoscope, 472. Puddling furnace, 45. Q. Queensferry, 292. Quick-firing guns, 206. Hotchkiss, 208. R. 823Railways, 101. Great Western, 106. Metropolitan, 114. Midland, 112. London and Manchester, 102, 124. London and Woolwich, 103. Pacific, 116. St. Gothard, 371. Stockton and Darlington, 101. Randt, the, 694. Rangoon petroleum, 759. Rays polarized, 401. Réaumur’s steel, 67. Recoil, 172. Recording instruments, 653. Red-short iron, 62. Reflection of light, 388. Reflection in water, 396. total, 399. Refraction, 397. double, 399. Regulators for electric lamps, 523. Reiss, 583. Reliance building, the, 78. Resistance, electrical, 494. Resonance, electric, 540, 541. Retina, 456. Reverberatory furnace, 45. Rifle, Brunswick, 180. Chassepot, 182. Lebel, 188. Lee, 188. Mannlicher, 187, 189. Martini-Henry, 184. magazine, 187. Mauser, 187, 188. military, 178. Minié, 181. Snider Enfield, 184. Vetterli, 189. Whitworth, 182. Rifled cannon, 190. Rifles, breech-loading, 182. reduction of bores of, 189. Rifling, 171. guns, 199. Righi, Professor, 541. Rigi, railways ascending the, 126. River steamboats, 144. Rock boring, 349. “Rocket,” 14. Rock-drilling machines, 355. Roentgen’s X-Rays, 445. Rolling iron, 71. Ronald’s telegraph, 548. Roscoe, 425, 437, 444. and Bunsen, 664. Royal Gun Factory, Woolwich, 27. Ruete’s ophthalmoscope, 466. Ruhmkorff’s coil, 730. S. Saint Paul building, the, 78. Saltash Bridge, 283. San Francisco, 123. Sand, properties of, 253. Saw, circular, 100. 824Sawing machines, 98. Saturn, 440. Schilling’s telegraph, 549. Science, benefits of, 1. Science and useful arts, 2. Scott’s phonautograph, 669. Screw, 86. cutting lathe, 87. dies and taps, 86. propeller, 116, 117. Sea anemones, 679. horses, 684. Secondary batteries, 530. Segment shells, 217. Senefelder, 556, 636. Shear steel, 54. Ship canals, 249. Ships of war, 149. Shrapnel shells, 216. Siemens, 67. Siemens’ dynamo, 522. pneumatic tubes, 341. regenerator, 68. regulator, 523. Siemens-Martin steel, 70. Sight, 452. Signals, railway, 108. Silver plating by electricity, 500. Sirius, 440. Skerryvore, 596. Skiagraphs, 447. Slide rest, 87. Smokeless powder, 226. Snider rifle, 184. Snow-plough, 123. Sodium, 715. Some phenomena of light, 382. Sommeiller perforators, 351. Sömmering’s telegraph, 548. Sound, 665. waves, 640. Sounding telegraph, 566. South African diamond fields, 701. Speaking machine, 670. tubes, 730. Spectra, absorption, 431. bright lined, 425. of permanent gases, 430. of salts, 424. of stars, 440. spark, 420. Spectroscope, 416. Spectrum, continuous, 422. lithium, 425, 436. of sodium, 424. pure, 420. solar, 418, 613. Sphygmograph, 660. Spiegeleisen, 64. Stage illusions, 395. Stars, distance of, 440. motion of, 442. spectra of, 440. Steamboats, river, 144. Steam engine, agricultural, 23. domestic, 25. forms of, 14. Newcomen’s, 3. portable, 23. Watt’s double-acting, 6. Watt’s improvements, 4. Steam Engines, 3. Steam carriages, 21. expansive working of, 8, 17. 825Steam hammer, the, 25. Steam Navigation, 129. Steam fire engine, 23. “navvies,” 269. rollers, 23. superheated, 9. Steamships, comparative sizes of, 138. recent improvements in, 139. speed of, 137. Steel, 52, 68. Bessemer, 58. blister, 54. cast, 54. Krupp’s, 55. puddled, 55. Réaumur’s, 67. shear, 54. Siemens, 68. tempering, 53. tensile strength of, 53. Stellar evolution, 810. Stephenson, George, 14, 102. Robert, 280. St. Gothard Railway, 371. Stereoscope, Brewster’s refracting, 470. Wheatstone’s reflecting, 469. Stereoscopic effect, 469. lustre, 472. views, 470, 474. Stereotyping, 642. Stevenson, Alan, 602, 603. Storage battery, 530. Strada, 547. Stratified discharge, 517. Stroboscopic disc, 476. Submarine cables, 575. Sub-Wealden, exploration, 362. Suez Canal, the, 251. Sun, elements in, 438. constitution, 438. Superheated steam, 9. Surface plates, Whitworth’s, 94. Suspension bridges, 284. Sympathetic needles, 547. Syphon recorder, 571. Swan’s carbon process, 619, 481. T. Table, air resistance to projectile, 177. benzol and toluol compounds, 789. coal raised in Great Britain, 727. coal-tar, colours, 794. composition of cast iron, 43. dimensions of parts of eye, 462. dimensions of steamships, 138. electric light v. gas, 514, 515. floatation of Monarch and Captain, 160. formulæ of hydro-carbon, 758. Gramme machine, 518. hydro-carbon in coal-tar, 782. illuminating power of gases, 774. lighthouse apparatus, 602. lighthouse lamps, 597. Martini-Henry rifle, 187. nitrogen and oxygen compounds, 731, 732. photographic actions, 612. products from 100 lbs. of coal, 796. ships of war, 166. telegraph code, Morse’s, 560. telegraph, war department, 557. tenacities of iron, 277. wave-lengths of colours, 411. Wheatstone’s dot signals, 565. 826Talbot, 610. Talbotype, 611. Tall buildings, 76. Tawell, arrest of, 550. Telegraphic instruments, 553. Telegraphic lines, 572. Telegraph poles, 572. Telegraphs in Great Britain, 574. Telegraphy, wireless, 546. Tel-el-Kebir, 260. Telepherage, 549. Telephone, the, 581. Telestereoscope, 472. Tenacities of iron, 277. Tension of electricity, 498. Tesla, Nikola, 542. oscillator, 542. Tesla’s experiments, 545. Thallium, 426. The Terrible, H.M.S., 167. Thomson, Sir W., 483, 570, 571, 805, 808. Throttle valve, 6. Thunderer, H.M.S., 164. “Times” newspaper, 387, 312. Tools, 85. Torpedo-boats, 231. Torpedoes, 227. Tour de Cordouan, 593. Tourmaline, 404. Tower Bridge, the, 297. Trajectory of projectile, 174. Tramways, 22. Transfer process, 638. Transvaal, 693. Tunnel, Mont Cenis, 351. St. Gothard, 373. Tunnels, helicoidal, 379. Turbine, 144. Turbinia, the, 144. Turret ships, 154. Tyndall, 383, 803, 809. U. Undulation of the ether, 409. V. Vaal River, 701. Valentine, electric, 581. Valve, throttle, 6. slide, 8. Vegetable nature of coal, 753. Velocity of light, 384. Venice, view in, 396. Vetterli rifle, 189. Victoria, Australia, gold-field of, 688. Victoria Bridge, Montreal, 282. Victoria, H.M.S., 166, 168. Vision, persistence of, 476. Visual impressions, 468. Voltaic element, 490. Vulcanite, 728. Vulcanized india-rubber, 727. W. Wall papers, machines for printing, 322. Walter press, 323. Warner’s torpedo experiment, 241. Warren girder, 280. 827Warrior, H.M.S., 150. Warships, new types of, 167. Water decomposed by electricity, 498. Waterproof cloths, 726. Watt, 3, 4, 8, 14. Welding, electric, 537. Wells, Horace, 735. Welsbach incandescent gas lights, 777. Whaleback, 147. Wheatstone, 387, 470, 474, 552. and Cooke’s telegraph, 548, 554. Wheatstone’s automatic telegraph, 564. dial telegraph, 568. dot signals, 565. Wheels of railway carriages, 107. Whitehead’s torpedoes, 232, 242. Whitworth’s guns, 193. rifle, 182. Wire-drawing for Atlantic cables, 576. Wireless telegraphy, 546. Woodbury printing process, 641. process for engraving photographs, 643. Woolwich, 27. “infants,” 201. Work, 11, 12, 160, 325, 804. X. X-Rays, 445. Y. Young’s paraffin oil, 762. Z. Zinc, amalgamated, 490. Zincography, 644. Zoetrope, 478. Zöllner, 475. EDINBURGH: PRINTED BY MORRISON AND GIBB LIMITED