370 



SUBJECT INDEX 



Exosmosis, 189 



Exponential law of absorption, 27, 144, 



145 

 Extinction coefficient, 145, 146, 158 

 Eye, astigmatism, 103, 112 



biophysical characteristics, 100 



accommodation, table of, 108 



energy threshold of, 114 



infra-red transmission of, 118 



internal pressure in, 103 



intraocular fluids, 103 



lens, 105 



opacity, 117, 118 



resolving power, 125, 311 



schematic, 101 



section, horizontal, 104 



simplified, Gullstrand's, 102 



spectral sensitivity of, 116 

 Eyeball, 101, 104 

 Eyepieces, 318, 319, 328, 329 



Fenestra vestibuli, ovalis, 271, 278, 279 



Films spread, 187 



Finsen unit defined, 142, 143 



Fisher Scientific Company colorimeter, 



157 

 Fluorescence, 49 



Fluorescent screens, x-ray, 49, 50 

 Fluoroscope, structure, 50 

 Fossa incudis, 279 

 Fovea, structure, 125 

 Freezing point, 196-204 



depression of, 197 



of electrolytes, 198 



of mammalian blood, 202 



of physiological fluids, 199 



of standard mixtures, 200 

 Fungicide, 188 



Gamma rays, 57-74 



absorption by tissue, 71 



coefficients of absorption, 72, 74 



dose, 35 



energy, 74 



ionization chamber, 83 



reduction coefficients of aluminum, 72 



table of absorption by lead, 72 



tissue reaction to, 82 



wavelengths, 74 

 Geiger-Miiller counter, use of, 94, 97 



Goiter, 95 



Gram-molecular weight, defined, 192 



Gullstrand's simplified eye, 102 



Half-life, 59, 60 



Half-value period, 59 



Half-value thickness, 32 



Hay test, 175 



Hecht's color theory, 131 



Helicotrema, 283, 303 



Helmholtz's theory of hearing, 287 



Hemoglobin, radioactive iron content, 95 



Hemoglobinometer, 153, 154, 157 



Hemolysis, 194 



Hensen cells, 282, 284 



Hering's color theory, 129 



Hering's retinal pattern, 125 



Huygenian eyepieces, 318, 329 



Hypertonic solutions, 194 



Hypotonic solutions, 194 



Immersion objectives, 318-322, 324 



Incus, 263, 268, 271, 302 



Index of refraction, table of, 325 



Induction coil, 212 



Intensifying screens, 49, 50, 245 



after-glow, 51 



brilliancy, 51 



contrast, 51 



grain, 52 



lag, 52 



Marcotte patent, 51 



speed, 52 

 Intensity, of aural harmonics, 300 



distribution in x-ray series, from mo- 

 lybdenum, 11 

 from tungsten, 11 



minimum audible, 258, 260 



of sound, 258 



threshold of ear, 266 

 Interaural muscles, 263, 267, 269, 275, 



276 

 Interface energy, 174 

 Interface structure, 179, 206, 207 

 Internal ear, 271, 282 

 Ionization, of electrolytes, 195 



of gases, 44 

 Ionization chamber, standard parallel- 

 plate, 41-43 

 Ionization doses, 35 



