INDEX. 



737 



Nachet's inclined and binocular micro- 

 scopes, 243, 245, 246 



Nasmyth's steam-hammer, 488 



Naturalists' magnifyirig-glasses, 235, 236 



Nautical telegraph ; Treve's night lantern, 

 698 



Navez, Captain, his chronograph, 469 



Navigation, Steam, 445 



Navigation, electric light applied to, 

 686 



" Nebel," or harp of the Jews, 135 



Nebulae, telescopic view of, 275 



Needle, magnetic, 520 



Needle-telegraphs, 548 



Neef's contact-breaker, 721 ; principle of 

 electric alarum, 622 



Nero's fountain, 81 



Newall, K. S., refracting telescope, Gates- 

 head, 262 



New Caledonia, lighthouse, 227 



Newcastle-on-Tyne, electric time-gun, 646 



Newcomeu's atmospheric engine, 439 



Newspaper printing ; Times printing- 

 machine, 494 



New York atmospheric railway, 80 



Neyt's improvements in microscopic photo- 

 graphy, 310 



Niepce de Saint Victor, inventor of photo- 

 graphy on albuminized glass, 301, 314; 

 discoveries in chromo-heliography, 321 



Niepce and Daguerre, inventors of photo- 

 graphy, 289, 290, 291, 292, 298, 301, 

 313 ; hot-air engines, 506 



Night, electric lights applied to works at, 

 686 



Nigre's process of heliography, 319 



Noble, Captain, his chronograph, 649 



Nollet's electric regulator and time-dial, 

 637 



Norwegian stoves, 347 



Nott and Gamble's dial-telegraphs, 567, 

 569 



o. 



Ocean- telegraph lines, 611 



CErsted's discoveries in electric telegraphy, 

 545, 660 



Opera-glasses, 252, 254 



Opera House, Paris, electric light room, 

 683 



Ophicleide, 176 



Optical apparatus employed in photo- 

 graphy, 304 



Optical instruments, application of the 

 Jaws of light to, 7. (See Microscope, 

 Telescope. ) 



Organ, the, 120 ; historical outline, 181 ; 

 pipes and stops, 182 ; mechanism, bel- 

 lows, sotmd-bo&rd, claviers, pedals, &c., 

 185; organ of St. Brieux, 187 ; great 



organ at Primrose Hill, 193 ; Barbari's, 



or Barbary organ, 196 

 Orientation. (See Magnetism.) 

 Osborne's discovery of photo-lithographic 



process, 317 



Oscillating steam-engine, 427, 429; mar- 

 ine, 457 



Oscillating electric motors, 651, 652 

 O'Shaughnessy's subaqueous telegraph, 



611 



Otto and Langen's engine, 510, 513 

 Oudrey's electro-type copies of bas-reliefs 



of Trajan's Column, 711 ; process of 



copper electro-plating, 718 

 Owen's double-action pump, 52 

 Ozanam, D., photographic registers of 



pulsation, 311 



P. 



Pacinotti's magneto-electric machine, 661, 

 663 



Paddle-steamers, 448 



Paddle-wheels, action of, 449 



Pantelegraphs, 548, 599 



Paper, photography on, 305 



Paper for autographic telegraphs, 602 



Papin's stearn-engines, 391. 392, 438, 445, 

 448 



Parabolic mirrors in lighthouses, 221 



Parachutes, 98 



Paris ; Observatory, new telescope, 271, 

 277 ; siege of, use of balloons, carrier- 

 pigeons, and microphotography, 311 ; 

 application of the electric light, 689 ; 

 consumption of fuel in, 355 ; telegraph 

 lines, 610 ; electric light and statues in 

 electrotype at new Opera House, 681, 

 711 



Passy, artesian well at, 46 



Paucton's application of the screw to navi- 

 gation, 451 



Pease, Edward, improvements in locomo- 

 tives, 462 



Peat, its employment and heating power, 

 354 



Pendulum, oscillations of the, 2332 ; 

 rotation of the earth proved by its 

 deviation, 26 ; compensating, 369; of 

 Caselli's pantelegraph , 603; electric, 

 639 



Penn's marine-engines, 457 



Perforating machine in Mont Cenis Tunnel 

 75 



" Perforator," in printing telegraphs, 592 



Perier, early experiments with marine 

 steam-engines, 446 



Perkins's hot-water heating apparatus, 352 



Perrot's improvements in electro-plating, 

 704 



Persian drums, 132 ; violin and tambourine, 

 151 



Peson, a foim of steelyard, 31 



3 B 



