372 



SUBJECT INDEX 



Objective, air-immersion, 314 



numerical aperture, 314, 321 



oil-immersion, 314, 320 



secondary spectrum in, 323 

 Ocular media, transmission of, 117 

 Oersted, defined, 360 

 Opacity to radiations, of aluminum, 19 



of atmosphere, 167 



of copper, 19 



of tissue, 16 



of water, 166 

 Optic nerve, action potentials in, 235, 236 



Conger vulgaris, 235 



impulse frequency in, 236 



latent period, 236 

 Oscillograph, cathode-ray, 241, 245 

 Osmometer, natural, 189 

 Osmosis, 189 

 Osmotic pressure, 188, 190 



of biological fluids, 203 



of blood serum, plasma, 203 



of electrolytes, 194, 195 



of marine animals, 204 



of proteins, 202 



of sucrose, 193 

 Ossicles, 261, 267 

 Oval window, 283 

 Owen's x-ray absorption law, 15 

 Oxyhemoglobin, absorption spectrum, 

 154 



Permeability, 170, 187 

 Phagocytosis, 181, 182 

 Phon, denned, 293 

 Photochemical activity, 162, 167 

 Photoelectric cell, barrier layer, 155 

 Photoelectric colorimeter, 155 

 Photoelectric effect, emission, 14, 39, 68, 



72, 73, 75 

 Photon, eye sensitivity for, 115 

 Photronic cell, 155, 156 

 Photronic cell colorimeter, 158 

 Physical constants, table of, 353 

 Physiological fluids, water content, 200 

 Pigments in skin, 137 

 Pitch, 296 



function, 297 



sensation, to produce, 299 

 Place-resonance theory, 307 

 Plasma membranes, 170 



Plasmolysis, 188 



Plateau's principle, 176 



Polarity of membranes, 205, 208, 215 



Positrons, 89 



Problems, numerical, 355 



Protection from x-rays, 36, 38, 51 



Proton, 88 



Pupil of eye, 109 



Quality classification of x-rays, 7, 27 



r-meter, 45, 46 

 Radioactive calcium, 96 

 Radioactive equilibrium, 61 

 Radioactive iodine, 95 

 Radioactive iron, 95 

 Radioactive phosphorus, 93, 94 

 Radioactive sodium, phosphate, 93, 94 

 Radioactive tracers, 94 

 Radiosodium, 93, 94 



in bone, 94 



in blood, 94 



in goat milk, 94 

 Radium, A, 57, 59, 78 



B, 57, 59, 64, 68, 70, 72, 78 



C, 57, 59, 64, 68, 70, 71, 73, 78, 97 



C, 57, 59, 70, 87, 88, 89 

 C", 57, 59, 64, 70 



D, 57, 59, 64, 65, 70 



E, 57, 59, 64, 67 



F, 57, 59, 64 



G, 57, 59 



applicators, radium dermatology, 82 



damage due to handling, 98 



dosage, 83 



elimination, 97 



fixed in tissues, 97 



injuries, 96 



price, 81 



protecting lead, 72 



tissue reactions, 80, 82 

 Radium burn, 96 

 Radium family, 57 

 Radium needle, 81 

 Radium poisoning, 96, 97 

 Radium standards, 98 

 Radon, 57, 62 



average life, 60 



boiling point, 75 



decay, 60, 79 



