

ANALYTICAL INDEX. 



43 



Meridian, standard, i. 563. 



Metallic contact, accidental discovery of the 

 effects of, i. 363. 



Metallic pistons, ii. 485. 



Metallic reflectors, i. 265. 



Mine?, the drainage of, ii. 441. 



Meteor at Dreux and Mantes in France, i. 

 601; meteor seen and described by Pel- 

 tier, i. 602; meteor of November, 1833, i. 

 466; of August, 1838, i. 469. 



Meteoric phenomena, various instances of, 

 i. 474. 



Meteoric stones and shooting-stars, i. 459- 

 474. 



Micrometer, description of, ii. 352. 



Micrometer-screw, ii. 293. 



Micrometric wire, ii. 24. 



Milky-way, the, ii. 378. 



Minor planets, the, i. 143-156. 



Molecules, or atoms, ii. 22. 



Moon, the, i. 307-322. 



Moon and the weather, i. 405-420. 



Moon's influence on the tides, i. 212; on 

 the weather, i. 315. 



Moonlight, ii. 193 ; physical qualities of, i. 3 12. 



Motion of comets, i. 173 ; motion not esti- 

 mated by speed and velocity alone, ii. 199- 

 201 ; motion absolute and relative illus- 

 trated, ii. 218. 



Motion and pressure, ii. 207. 



Morrison's weather almanac, i. 165. 



Mosaic account of the Deluge, ii. 77. 



Mountain Tycho, appearance of, i. 319. 



Mountains of the moon, i. 318. 



Multiplier, or galvanometer, ii. 124. 



Mutual attraction or repulsion of electrized 

 clouds, i. 533. 



Murray's slides, ii. 476. 



Napoleon's invitation to Volta to visit Paris, 

 i. 367; his liberality, i. 368. 



Neap tides, i. 215. 



Nebulae and clusters of stars, ii. 383 ; neb- 

 ulas in the constellation of the Swan and 

 the Great Bear, ii. 384, 385 ; nebulae re- 

 solvable into stars, ii. 387; nebulae in 

 Orion, ii. 388 ; catalogue of nebulae, ii. 

 392; planetary nebulae, ii. 395. 



Nebular hypothesis of Laplace, ii. 395. 



Nebulosity, the, i. 519. 



Negative state of the earth, ii. 156. 



Needles and steel bars magnetized by means 

 of the electric currents, ii. 121. 



Newcomen and Cawley's patent for an en- 

 gine, ii. 411. 



Newcomen's conception of the atmospheric 

 engine, ii. 411. 



Norman discovers the dip of the magnetic 

 needle, ii. 113. 



New metals : potassium, sodium, barium, 

 strontium, calcium, &,c., i. 395. 



New planets, the, i. 205-208. 



Newton's speculations on the subject of 

 comets, i. 179, 425 ; his researches on the 



subject of the weights of bodies, i. 487 ; 

 his explanation of the prismatic spectrum, 

 i. 577 ; his three propositions, or the laws 

 of motion, ii. 203. 



Nitric acid formed by the electric spark, ii. 



65 ; produced during a thunder-storm, ii. 



65. 



Non-conductors of heat, ii. 183. 

 Nucleus, the, i. 520. 



0. 



Object, image of an, in a plane reflector, i. 

 262. 



Oersted's experiments in electro-magnetism 



at Copenhagen, ii. 120. 

 Olbers discovers Pallas and Vesta, i. 206. 

 Orbit of Halley's comet, its magnitude, i. 



187. 



Orbit of the moon, i. 321. 

 Orbits and transits of Venus and Mercury, ( 



i. 147. 

 Orbitual motion of comets, i. 513 ; of double * 



stars, ii. 365. 



Ordinary state of the atmosphere, ii. 151. ( 

 Orion, ii. 336. 

 Otto Guericke's electrical machine, i. 105. 



P. 



Paddle-wheels of steamboats, ii. 255 ; de- 

 fects of common ones for Atlantic steam- 

 navigation, i. 272. 



Paiitzch, a peasant near Dresden, first dis- 

 covers Halley's comet on its reappearance, 

 i. 184. 



Pallas, i. 206, 208. 



Pa pin produces a vacuum by the condensa- 

 tion of steam, ii. 441. 



Papin's invention for rowing vessels age.' *st 

 wind and tide, ii. 442. 



Parallax, the annual, ii. 365. 



Parallel forces, ii. 221. 



Parallel of latitude, i. 562. 



Parallel motion, ii. 454. 



Parallelogram of forces, ii. 208. 



Paratonnerres, or lightning conductors. :: 

 102. 



Paschal's experiment on atmospheric p- .'- 



Pegassus, ii. 341. 

 sure, i. 287. 



Peltier's experimental illustration of th: 

 phenomena of water and land spouts, i. 635. 



Pendulum, the, ii. 265; illustrated and ex- 

 plained, ii. 266. 



Perihelion and aphelion, i. 482. 



Period and orbit of Encke's comet, i 473, 

 424 ; of Biela's comet, i. 426. 



Periodic comets, i. 423-434. 



Periodic motion of double stars. ;.. 3:7, 



