418 



INDEX. 



Magnetism and electricity, correlation 

 of, 239. 



and crystallisation, 57. 

 Magneto-electrical decomposition,230. 

 Magnetisation of light, 146. 

 Mangauesiate of potash, 1.71. 

 Mammalia, fossil, 343. 



Man, temperature of, 105. 



Mains on polarisation, 139. 



Mantell, Dr., on the iguanodon, 343. 



Mariotte on seat of vision, 149. 



Matter, its general conditions, 1. 



, forms of, 21. 



, transmutation of, 37- 



, divisibility of, 38. 



, solid, absorption of heat by, 75. 



, influence of, on light, 162. 



, polarity of, 265. 



and its properties, 409. 

 , entity of, 410. 



, varied condition of, 36. 

 Mayer'shypothesisofthreecolours,138 

 Mechanism of the eye, 149. 

 Media, influence of, on light, 128. 

 Medusae, phosphorescence of, 159. 

 Mechanical force and heat, 103. 

 Melloni on coloured heat rays, 85. 



on new nomenclature for heat, 95. 

 Mesmer and electricity, 222. 

 Metamorphic rocks, 336. 

 Metamorphoses of animals, 389. 

 Mexico, Gulf of, warmth of the, 81. 

 Mica, black, transparency to heat, 66. 

 Miller, Dr. on dark lines of the spec- 

 trum, 126. 



Mines, Cornish, temperature of, 91. 

 Mineral veins, electricity of, 225. 

 Miocene formations, 346. 

 Mirrors, magic, 191. 

 Mitscherlich on expansion of crystals 



by heat, 257. 

 Molecular forces, 35, 40. 

 , compound action of, 279. 

 Molecules, Dumas on, 39. 



combination, 277- 



Morichini and Carpi on magnetism of 



violet rays of light, 263. 

 Moser on invisible light, 189. 



Motion, 7- 



a property of matter, 8. 

 , principles of, 10. 



of the earth, 12. 



round an axis shows the earth's 

 motion, 13. 



influence of, on form, 32. 

 Mountain ranges probably determined 



by magnetic force, 262. 

 Multiplication of life, 399. 

 Musical notes produced by heat, 97. 

 Muscular contraction by electricity, 



202. 



Muschenbrock of Leyden, 198. 

 Mythology, ancient, probable origin 



of, 353. 



NATURAL polarization, 145. 

 Nebulous state of matter, 23. 

 Neptune, discovery of, 32. 

 Newton on gravitating force, 49. 

 Newton on motion, 9. 

 Newton's hypothesis of matter, 4. 



theory of heat, 115. 



theory of light, 120. 



theory of colours, 135. 



Niepce on the chemical radiations,! 68. 

 Nitrogen, magnetic neutrality of, 259. 

 , combinations of, 324. 

 , supposed metallic nature of, 325. 

 Nocturnal radiation, 83. 

 Northern lights, the, 268. 



OBSIDIAN transparency to heat, 66. 



Ocean, waters of, 303. 



Oersted discovers electro-magnetism, 



238. 



Orders of animals, 386. 

 Organic creation, influence, 185. 



compounds, 283. 



compounds, influence of light on 

 them, 181. 



chemistry, 331. 



cell, 360. 



remains, 337- 



Organized forms, varieties of, 35. 



bodies, heat of, 104. 

 Organization, progress of, 385. 



