730 



INDEX. 



Rain's electric telegraph, 555 ; writing and 

 printing telegraphs, 583, 597 ; electric 

 regulator, 63^ 



Balances, in commerce and the arts, 28 



Baldus' process of heliography, 319 



Balloons, 5, 87103 



Balloon communications during the siege 

 of Paris, 311 



Bank-notes printed from stereotype plates, 

 708 



Barbari's, or Barbary organ, 196 



Barral and Bixio, MM., their balloon ex- 

 periments, 91, 96, 103 



Barrel-organs, 197 



Barometer, measuring heights by the, 

 84 



Bassoons, 173 



Batteries employed in telegraphy, 620 ; for 

 regulating electric clocks, 688 ; applied 

 to the chronoscope, 648 ; for electric 

 light, 683 ; for blasting mines, 694 



Baume's hydrometers, 38 



Beam-engines, 420, 425, 454 



Becquerel's discoveries in chromo-helio- 

 graphy, 320 



Beer and Mredler's map of the moon, 329 



Behren's rotatory pump, 57 ; rotatory 

 steam-engine, 431 



Belgian railways, lightning-conductors for 

 electric telegraphs, 627 



Belgian vocabulary of single-needle tele- 

 graph, 551 



Bell, Henry, improvements in steam 

 navigation, 447, 448 



Bell-buoys, 107 



Belleville's circulating boiler, 409 



Bells, 119, 125 



Bengal, formation of artificial ice in, 

 382 



Berniere, his burning-mirror and burning- 

 glass, 367, 368 



Berres and Donne, their experiments in 

 photography, 314 



Bersch, his discoveries in microscopic 

 photography, 309 



Bethencourt's electric telegraph, 544 



Bianchi's lightning-conductor for electric 

 telegraphs, 627 



Binnacle of a man-of-war, 524 



Binocular and monocular vision, the 

 stereoscope, 280 



Biot, his meteorological experiments with 

 balloons, 102 



Bishop's disc rotatory steam-engine, 431 



Bixio and Barral, MM , their balloon ex- 

 periments, 91, 103 



Blackett, steam-locomotion on railways, 

 462 



Blaize, M., organizer of microscopic post 

 during the siege of Paris, 311 



Blanquard-Evrard, his share in the inven- 

 tion of photography on paper, 298, 299 



Blasting in mines by electro-magnetism, 

 693 



Blowers for fire-place?, 342 



Boilers, of steam-engines, 396 410 ; of 

 marine- engines, 454, 456 ; of locomo- 

 tives, 462, 465 ; of portable-engines, 

 486 : explosions, 502 



Bond, William Cranch, his work in 

 astronomical photography, 327 



Bonnemain, the inventor of hot-water 

 heating, 351 



Boring machines in the Mont Cenis Tunnel, 

 75 



Boulanger's chronograph, 649 



hourbouze's electro-motor, 652 



Bourdon, the Brothers, their application 

 of the screw-propeller, 452 



Boydell's road-locomotive, 479 



Brake, electric, 659 



Bramah's hydraulic press, 33 ; oscillating 

 pump, 54 



Brasero, Spanish, 335 



Brass musical instruments, 175 



Brass, electro-plating on, 711 



Bray's road-locomotives, 477, 479 



Braziers, ancient and modern, 336 



Brebner, A., improved prisms for light- 

 houses, 231 



Breguet's inventions in electric telegraphy, 

 546 ; dial telegraph, 559, 562, 571 ; 

 vibrating alarum, 623 ; lightning-con- 

 ductor for electric telegraphs, 626 ; 

 electric regulator and time-dial, 637 ; 

 chronoscope and chronograph, 649 ; 

 magneto-electric exploding apparatus, 

 696 



Brest, transatlantic cable station, at, 617 



Brett s printing telegraph, 583; submarine 

 telegraph, 611 



Brettes, Martin de, his chronograph, 649 



Brewster's lens, 235, 237 ; his improved 

 stereoscope, 283 ; magnesium lamps, 

 308 



Brick as a heat-conductor, 363 



Brick stoves, 345 



Bridge-building, use of compressed air, 82 



Brino pits in France, 381 



Bronze, electro-plating on, 711 



Brown, Samuel, his application of the 

 screw-propeller, 452 



Bruges, chimes of public clocks at, 128 



Brugnatelli, discovery of electro-plating, 

 703 



Bryceson Brothers, great organ by them at 

 Primrose Hill, 192 



Buddicomb's locomotive engine, 470 



Buffon, compound mirrors made by, 366, 

 368 



Bunsen's electric batteries applied to 

 telegraphy, 620 



Burning-glasses and mirror?, 365 



Butterfly- valve of steam-engine, 427 



c, 



Cables, telegraphic, 611, 613, 617 

 Culla's steam mandrel-lathe, 491 



