INDEX 



245 



Optical glass, 98 



Optical Institute, Leningrad, 184 



Organisms, classification of, 147 



Ornstein, Martha, 82, 87 



Osmotic pressure, 133 



Ostwald, Wilhelm, 131, 132 



Oxygen, 121 



Painter, T. S., 162 



Paleolithic period, 23, 40 



Paleontology, 147 



Parallax of stars, 91 



Pasteur, Louis, 166, 167 



Patents, development of, 194 



Paterson, C. C, 202 



Pendulum, 99 



Periodic table, 134 



Perkin, W. H., 123, 175 



Petrie, W. M. F., 9, 24, 25, 28, 

 29, 30, 31, 33, 35, 37, 38, 

 230 



Petroleum, chemicals from, 128 



Petroleum industry, research in, 

 217 



Phase rule, 132 



Phillips, H. B., 19, 200, 229 



Philosophical Transactions of the 

 Royal Society, 84 



Philosophy, Arabic, 76 

 Greek, 68 

 Stoic, 72 



Phlogiston, 120 



Photographic research, 179 



Photographs, observation of, 50 



Photography, science of, 43 

 technology of, 43 



Photo tubes, 110 



Phvsical Chemistry, Institute of, 

 Moscow, 184 



Physical methods and social sci- 

 ences, 229 



Physico-technical Institute, Khar- 

 kov, 184 

 Leningrad, 184 



Physics, growth of ideas, 88 

 nuclear, 140 

 origin of, 88 



Physiological chemistry, 178 



Physiology, 171 



Pilate, Pontius, 19 



Pile, atomic, 143 



Pitchblende, 135 



Pitt, William, 233 



Planck, Max, 55, 112, 113 



Planets, orbits of, 91 



Plankton, production of, 228 



Planning, industrial research, 6, 7, 

 8, 195, 221 ff. 

 scientific research, 195 



public discussion of, 198 

 in society, 228, 229 

 in war, 229 



Plants, fertilization of, 157 

 reproduction of, 158 

 respiration of, 151 



Plastics, 129 



Plato, 4, 7, 9, 68, 71, 72, 74, 95, 

 226 



Pliny, 73 



Plutonium, 143 



Polanyi, M., 49 



Polarization of light, 100, 101 



Political action, fundamental prin- 

 ciples of, 233, 234 



Political economy, 226 



Political methods and pure reason, 

 233 



Politician, task of, 232 



Politicians as seen by scientists, 232 



Politics and economics, foresight 

 in, 229 



Politics and emotion, 232 



Politics and science, 226 



Pollination, 151 



Polonium, 136 



Polybius, 7, 9 



Polymerization, 128, 129 



Pottery, 25, 26 



