'36 



JSDEX. 



Lightning-conductors, principles of their 

 construction, 531 ; description and ar- 

 rangement of, 536 ; for electric telegraphs 

 580, 624 



Lippens, electric alarum, 622 



Lippershey, Jean, discovery of the refract- 

 ing telescope, 250 



Lithography and photolithography, 317 



Lochindall lighthouse, 231 



Locomobile, or portable engine, 484 



Locomotive steam-engines, 428, 461 

 484 



Lomond's electric telegraph, 544 



Longitude determined by electric time- 

 signals, 645 



Lotz, M., his road locomotive, 478 



Louis XIV., his chair to increase warmth, 

 338 



Low-pressure steam-engines, 426 ; for 

 navigation, 454 



Lunar crater, telescopic view of, 275 



Lutes, 153 



Lyons, Breguet's illuminated clocks at, 

 637 



Lyres of the ancient Greeks, 136, 137 



M. 



Macconnell's locomotive engine, 470 

 Maedler, on astronomical photography, 



327 ; his map of the moon, 329 

 Magellan's perpetual meteorograph, 723 

 Magic funnel, 48 



Magnetism and electricity, 519 726 

 Magnesium lamps, their application to 



photography, 308 

 Magnetic exploder for blasting mines, 



697 



Magnetic gauge for steam boilers, 403 

 Magnetic needle, 520 

 Magneto-alphabetical telegraph, 573 

 Magneto-electric machines, 620, 660, 673, 



680 



Magnifying glasses, 235 

 Mandoline or mandora, 153 

 Manipulators of electric telegraphs, 572, 



576, 580, 583, 597, 599, 616, 618 

 Maps of the moon, 328 

 Marie Davy battery applied to electric 



telegraphy, 620 



Marine-boilers and engines, 445, 454 

 Mariner's compass, 519 530 

 Marly, water-wheels and pumps at, 55 

 Marriotte's burning - glass of ice, 367 ; 



compressed air-gauges, 404 

 Mars, telescopic view of, 275 

 Mason's levels, 18 

 Msson's inventions in electric telegraphy, 



546 



Maudsley's marine-engines, 457 

 Mazeline steam-lathe, 491 

 Medals reproduced by electro-typing, 



707 



Medical electricity, 719 



Mercury box for developing daguerreotype, 

 293 



Metallic precipitations, magneto-electric 

 machines for, 666 



Metallic pressure-gauge for steam-boilers, 

 405 



Metallic sifter, electric, 658 



Metals as heat -conductors, 363, 364 



Meteorology, 5 ; employment of balloons, 

 99, 102 



Meteorological observations, electricity 

 applied to, 722 



Meyer's pantelegvaph, 603, 604 



Microscopes, 233248 



Microscopic photography, 308, 325 ; de- 

 spatches during the siege of Paris, 311 



Microscopic projections, use of the electric 

 light, 689 



Military operations, application of aerosta- 

 tion to, 99 ; employment of the electric 

 light, 689 



Miller, Patrick, his work on steam-navi- 

 gation, 446 



Miners' safety-lamps, 361; electro-magnetic 

 apparatus for, 690 



Mines, blasting by electro-magnetism, 

 693 



Mines illuminated by electricity, 686690 



Minotaur steam-ship, 457, 458 



Mirrors and reflecting instruments, 201 



Mirrors for reflecting telescopes, 263, 270 



Mirrors. (See Burning-mirrors. ) 



Models copied by electro-type, 709 



Moitessier's improvements in microscopic 

 photography, 310 



Monocular and binocular vision ; the 

 stereoscope, 280 



Moon, maps of the, 328 ; heat of its 

 reflected rays, 368 



Montcel, improvements in submarine tele- 

 graphy, 616 ; electro-motive engines, 

 651 ; electro-magnetic machine for blast- 

 ing mines, 695 ; anemograph, 723 



Mont Cenis Tunnel, 4, 71 



Montgolfier's experiments with balloons, 

 88, 91 ; hot-air engines, 506 



Moreland, Samuel, inventor of the speak- 

 ing-trumpet, 111 



Morin, General, products of combuatiou, 

 343, 346; steam-boilers, 410 



Morse, his inventions in electric telegraphy, 

 546 ; the Morse alphabet, 582 ; Morse 

 writing-telegraph, 575 



Morse-Digney telegraph, 579 



Mountain locomotives, 473 



Murray's improvements in steam-engines, 

 444 



Musette, or improved bag-pipe, 180 



Musical box, 121 



Musical instruments in relation to the laws 

 of sound, 5, 119197 



Musical telephone, 112 



Music rooms, application of acoustics to, 

 116 



