778 



INDEX. 



Iron, whence obtained, 396. 

 Irradiation, Laws of, 106. 

 Islands, Coralline, 619. 

 Isoclinic lines, 257. 

 Isodynamic lines, 257. 

 Isogenic lines, 257. 



_ar, Leyden, Home-made, 199. 

 Jardin, The, near Chamouni, 607. 

 ^ elly-fish, 709, 



ersey, Mirage in, 19. 



uggling, Balance experiments, 31 



uno, Discovery of, 528. 



upiter, Appearance of, 530. 

 ,, Moons of, 529. 

 ,, The planet, 528. 

 Jurassic formation, The, 586. 



Keuper formation, The, 585. 

 Kinetic theory, The, 72. 

 Kite, A new, 448. 



Franklin's, 286. 

 Knots and cords, Puzzle of, 775. 



Laboratory, Chemistry without, 313, 



Lactoscope, The,. 157. 



Ladd, Lontin and, 275. 



Lakes, 627. 



Lamp, A good petroleum, 761. 



,, A new alarum, 760. 



Dobereiner's, 408. 



Gay-Lussac's, 327. 



,, The Edison, 269. 



,, The safety, 347. 



,, The Swan, 271. 

 Land, Sailing on, 463. 



, , Water and, 603. 

 Lantern, Magic, 158. 

 Lapis-lazuli, 442. 

 Latent heat, 89. 

 Latex, what it is, 663. 

 Latitude, Longitude and, 505. 

 Laughing gas, 361. 

 Laurentian system, The, 573. 

 Lead, 401, 446. 



Crystallization of, 323. 

 Leaning, Laws concerning, 33. 



,, towers, Laws of, 33. 

 Leaves, Anatomy of, 671. 

 Arrangement of, 673. 



The. 670. 



,, Varieties of, 671 



,, Various, 150. 

 Leech, The, 714. 



Lenses, Description of various, 150. 

 Leo, Constellation, 538. 

 Lepidoptera, The, 721. 

 Leyden jar, To make a, 199. 

 Lias, The, 586. 

 Libra, Constellation, 539. 

 Lichens, 689. 

 Lift, Hydraulic, 71. 

 Light, a vibratory motion, 93. 



,, Absorption of, 95. 



and its sources, 93. 



Cost of, 101. 



,, Decomposition of, 143. 



,, Definition of, 93. 

 Lightning, Different kinds of, 289. 

 Light distributed in rays, 94. 



,, electric, HoV to produce, 265. 



i, ,, First discovery of, 221. 



,, heat and, Connection of, 94. 



,, in the eye, 142. 



of an electric spark, 119. 



,, oxy-hydrogen, The, 160. 



Polarization of, 155, 



producer of life, 660. 



Light, Reflection of, 95. 



,, Refraction of, 96. 



, , Velocity of, 94. 



, , what made up of, 143. 



,, Zodiacal, 500. 

 Lightning, Forked and sheet, 289. 



,, Colour of, 288. 

 Lights, Bengal, how made, 404. 



,, Comparison of, 99. 

 Lime, Salts of, 393, 437. 

 , Lines, Isoclinic, 257. 



,, Isodynamic, 257. 



,, Isogonic, 257. 



,, Isothermal, 653. 



, , oblique, Influence of, 121. 

 Linnsean system, The, 695. 

 Liquids, Definition of, 4. 

 ,, Displacement of, 69. 

 , , Gases and, 44. 

 Lithium, 393. 



Longitude, Latitude and, 505. 

 Lontin, Ladd and, 275. 

 Ludion, The, 57. 

 Luminous paint, 160. 



,, surfaces, Laws of, 107. 



Machine, electric, To make an, 207. 

 ,, Tree-felling, 767. 

 ,, Writing, 246. 

 Machines, Electro-magnetic, 272. 

 Maestricht formation, The, 590. 

 Magic squares, 732. 



,, top, The, 740. 

 Magnesian limestone, The, 583. 

 Magnesium, 395, 439. 

 Magnet, A natural, 231. 



,, Definition of a, 231. 

 Magnetic dip, The, 256. 



,, inclination, 256. 

 Magnetism, Electro, 255. 



,, Terrestrial, 645. 

 Magnetization, 232. 

 Magnets in ancient times, 254. 

 Magnitude, Centre of, 34. 

 Man cave, The, 598. 

 ,, during the Glacial Period, 597. 

 ,, prehistoric, 597. 

 ,, river-drift, The, 598. 

 Manganese, 400, 445. 

 Mars, Moons round, 526. 



,, The planet, 523. 

 Mathematical games, 726. 

 Matter, Definition of, 4. 

 Medullary rays, The, 669. 

 Medusae, The, 709. 



,, Phosphorescence of, 740. 

 Megaphone, Mr. Edison's, 183. 

 Membrane tympani, The, 166. 

 Menagerie for insects, 10. 

 Menisques in a barometer, 65. 

 Mercury, All about, 521. 

 ,, Fulminating, 420. 

 ,, Uses of, 405, 446. 

 Mesozoic period, The, 584. 

 Metals, Characteristics of,' 388. 

 ,, Classification of, 389, 409. 

 ,, Common and precious, 320. 

 ,, in the spectroscope, 146. 

 Noble, 405. 

 ,, Specific gravity of, 389. 

 ,, what they are, 388. 

 Meteorites, aerolites, or, 493. 

 Meteorology, 628. 



, , ' Phenomena of, 20. 

 Meteors, what are they ? 490. 

 Mica, 443. 



Microscope, Invention of the, 149. 

 ,, perfscopic, The, 150. 



Microscope, The spectrum, 147. 

 Microscopes, Reflecting, 150. 

 Milk, Constituents of, 422. 



,, Sugar of, 423. 

 Milky way, The, 553. 

 Millstone grit, 581. 

 Mineralogists, Apparatus for, 17. 

 Mineralogy, Crystallography, 424. 

 Mineral waters, 372. 

 Minerals, Amorphous, 431. 



,, Classification of, 424, 425. 

 ,, Definition of the term, 424. 

 ,, Synoptical table of the, 435. 

 Miocene formation, The, 593. 

 Mirage at Havre, 19. 

 ,, Cause of, 649. 

 ,, in Jersey, 19. 

 ,, on beaches, 18. 

 Mirrors, Remarks on, 95. 

 Mistral, The, 631. 

 Mixtures, Freezing, 89. 

 Molecule, Definition of a, 309. 

 Molluscs, 724. 



Money-boxes, Scientific, 745. 

 Montgolfier, Discovery of, 2. 



,, Early balloons of, 295. 



Monsoon, The, 630. 

 Moon, Description of the, 510. 

 Eclipses of the, 519. 

 Influences of on weather, 652. 

 its influence on the tides, 517. 

 Motion of the, 513. 

 Phases of the, 515. 

 Rate of progression of the, 513. 

 Superstitions concerning, 510, 



513- 



,, Surface of the, 511. 

 ,, Planetary, 489. 

 Morphine, 416. 

 Morse system, The, 241. 

 Morse's telegraph, 233. 

 Mosses, Algae and, 688. 

 Motion, Causes of, 40. 

 Definition of, 40. 

 Perpetual, 41. 

 Mould, Vegetable, 690. 

 Mountain strata, Contortion of, 625. 



What is a, 624. 

 Mountains, Causes of, 624. 

 Slopes of, 625. 



Movements, Synthesis of, 124. 

 Multiplier, First use of the, 232. 

 Mural circle, The, 478. 

 Musical pitch, 193. 

 Muslin, Incombustible, 313. 

 Myriapoda, The, 716. 



Natural History, 4. 



Philosophy, 4. 

 system, The, 699. 

 Nature, Balance of, 617. 



Forces of, 22. 



Need for knowing about, 3. 



Nothing mute in, 21. 



Smooth polish of, 14. 



Phenomena of, 3. 



what it is, 2. 

 Near-sightedness, 140. 

 Nebulae, 551. 

 Needle, Game of the, 729. 

 ,, The magnetic, 231. 

 ,, machine, The, 238. 

 Negative and positive electricity, 202. 

 Neptune, The planet, 534. 

 Nichol's prism, 156. 

 Nicholson's classes of plants, 702. 

 Nickel, cobalt and, 401, 445. 

 Nicotine, 416. 



