INDEX 319 



Organisms, chemical constituents of 100, 101 



psychic properties of 50 



unicelhilar, immortality of 147 



Origin of life 242 



Gaskell's theory of the 153, 178-180, 242 



amenable to test 180, 181 , 272 



plural 179, 233, 235, 242, 243 



theories about, not amenable to test 13 



not convincing 13 



Origin of species, current theory of the 213 



Gaskell's theory of the 153, 182, 183, 233-243 



problem of the 214 



Oaborn, Henry Fairfield. .63, 174, 199, 201, 206, 207, 212, 230, 236, 240, 241, 249 



Osmosis 298 



Osmotic forms 173 



pressm-e 298 



van't Hoff's law of 303 



Ostwald, Wilhelm 59, 256 



Wolfgang 60, 62, 66, 250, 258 



Overton, James B 226 



Oxidation 296 



Oxygen 51, 52, 102, 268, 296 



Panspermatism 13, 65, 179, 181, 252, 253, 296, 297 



Parthenogenesis 215, 216, 297 



artificial : ... .59, 223-228, 250 



and ions 185 



Paschen, F 97 



Pasteur, Louis 14, 283, 301 



Paton, D. Noel 262 



Pauli, Wolfgang 71, 171, 182, 248, 251, 255 



Pearl, Raymond 13-17, 148, 166, 211 



Pearson, Karl 31, 40 



Peltier, J. C. A 289 



Periodic table of the elements 28, 77, 78, 98 



Perrin, Jean 71, 183 



Pettibone, C. J. V 55 



Pfeffer, Wilhehn 248 



Phase 297 



rule, Gibbs's 292 



Philochoras 195 



Photoelectric effect 108, 297, 299 



Photosynthesis 53, 54 



