INDEX 



ORGANIC chemistry, Berthe- 



lot's, 176. 

 Overton, 218. 

 Oxydase, 234. 



PARTHENOGENESIS, 200, 209. 



Pasteur, 30, 228, 230, 274, 333; 

 jubilee speech of, 330. 



Perrin, Jean, 153, 161. 



Phagocytosis, 277. 



Philadelphus, founder of Alex- 

 andrian medical school, 10. 



Phosphorus, role of, 253. 



Plato, 29, 30. 



Plutarch quoted, 29. 



Poisons, organic, 281. 



Powder, smokeless, 186. 



Prolongation of life, 215. 



Protoplasm, what is, 253. 



Protoplasmic threads, 104 



Prout, 93. 



Ptolemy, 4, 10, 23, 26. 



Queries, Newton's, 108. 



RADIO-ACTIVITY, 296. 



Radiometer, 148. 



Radium, 163. 



Rayleigh, Lord, no. 



Reflex action, 261. 



Renan quoted, title-page, 170, 



191. 



Reversibility of life, 239. 

 Ribbert, 206. 

 Richet, Charles, 264. 

 Rijjhi, 312. 

 Romanes, 207. 

 Rontgen oil-drops, no. 

 Rontgen rays, 43, 80. 

 Royal Institution, 345, 352. 

 Rumford, Count, 352. 



SALTS, effect of, on heart-beat, 



207. 



Schleiden and Schwann, 298. 

 Senility of the cells, 347. 

 Senses, vagueness of our, 303. 



Serums, 278. 

 Side-chains, 284. 

 Soap-bubble, wall of, 107. 

 Sodium in a flame, 113. 

 Solutions, precipitated by elec- 

 trolytes, 91; theory of, 208. 

 Soury, Jules, 263. 

 Shakespeare, 103. 

 Slaby and Arco, 314. 

 Smithsonian Institution, 349. 

 Space, temperature of, 87. 

 Spectroscope, the, 65. 

 Spencer, 28. 

 Spider's web, 104. 

 Stereotropism, 203. 

 Stokes, Sir George, 156. 

 Stoney, Professor, 139. 

 Sully, Professor, 306. 

 Sun, a ball of gas, 86. 

 Syene, 89. 

 Syntony, 313, 324. 

 Syracuse, 14. 



TELEPATHY, 291. 



Thomson, Professor J. J., 47, 



82, 138, 153. 

 Thought, what is, 269. 

 Thought- waves, measure of, 



264. 



Thurston, R. H., quoted, 310. 

 Torricelli, 24. 

 Tyndall quoted, 33, 198. 



UNIVERSE not infinite, 98. 

 Uranium rays, 163. 

 Urstoff 95. 



VACUUM, highest, 149. 



Valency, 213. 



Van't Hoff, 206. 



Verworn quoted, 228. 



Vibration of molecules, 121. 



Vielle, 186. 



Visibility, limits of microscope, 



105. 



Volta, 133. 

 Vortex- ring, 142. 



360 



