INDEX. 



Atr-gan, action of the, 219, 220. 

 Ancient method of inquiry, 317. 

 Ancients, philosophic aims of the, 13. 



their mode of explaining phenomena, 



103. 



Andrews, Dr., 135, 162. 

 Animal force, derivation of, 423. 



heat, source of, 824. 



nutrition, 421. 



system, early conception of, 212. 

 Anomaly in expansion and contraction, 52. 

 Aphides, multiplication of, 411. 

 Aristotle, 817. 



Astronomy, tendency of its progress, xi. 



difficulties of, 319. 



early development of, 820. 

 Atmosphere, limit of, 136. 



pressure of, 819. 



Atomic theory, objections to, 164. 

 Atoms, question of existence of, 347. 

 Authority, value of, 11. 

 Automatic machines, 211. 



Bacon, Francis, philosophy of, 14. 



Becquerel, M., 102, 125. 



Beclard, M., 175. 



Bergmann on electrical effects, 35. 



Bessel, 241. 



Brodie, Sir B., 175. 



Buffon, 814. 



Causation, Grove on, 15. 

 secondary, 18. 

 Cause and effect, 251. 



simultaneity of, 17. 



Cause, nature of, 402. 

 Caoutchouc, anomaly of, 58. 



Carbonic acid the index of animal power, 



431. 

 Carnot 224. 



on the transfer of heat, 70. 

 Carpenter. Dr., xxxi., xxxiv., 173. 



biographical notice of, 400. 

 Catalysis, 6,169. 



Chemical action, what is it ? 153. 



a cause of light, 162. 



produces magnetism, 162. 



-: the source of mechanical power, 891 



affinity as a cause of motion, 152. 

 a cause of heat, 159. 



force converted into electrical, 154. 

 Chcmistrv of plants, 395. 



Clarke, Mr. Latimer, 129, 181. 



Clausius, Prof., xxviii., 104, 228. 



Cohesive attraction, 171. 



Cold regarded dynamically, 48. 



Colding, Prof., 'J24. 



Coleridge, 108. 



Collision, effects of, 29. 



Combustion, key to the phenomena of, 321. 



Comets, Mayer on, 270. 



Compression, heat resulting from, 32. 



Conservation of force, importance of the 



problem, 856. 



Constancy of the sun's mass, 282. 

 Constructive action of plants, 417. 

 Cooling of the earth, 80. 

 Cordier, M., 307, 313. 

 Correlation of physical forces, meaning of 



the phrase, 3, 383. 



the problem to be solved, 189. 



difficulties of the investigation, 



194. 



Cosmogony, Grove on, 81. 

 Cotton factory as a distributor of force, 403. 



D 



Dagucrre, M., 112. 

 Dalton, 157, 159. 



