368 



SUBJECT INDEX 



Aural microphonics, 306 



Bactericidal ultraviolet light, 139, 161, 



162 

 Basilar membrane, 277, 284, 285, 286, 



305 

 Bausch and Lomb Optical Company, 

 colorimeter, 153 



hemoglobinometer, 153 

 Beer's law of absorption, 145, 149, 151, 



152, 155 

 Bel notation, 290 

 Beta rays, 55, 57 



absorption coefficients, 64 



absorption of, 68 



deflection by magnetic field, 63, 66 



energy, 65, 67 



filters, 69 



origin of, 65 



spectra, 66, 67, 75 



velocity, 64, 67 

 Blood, absorption spectrum of, 154, 159 



composition of, 208 



freezing point of mammalian, 199, 202 



ionic content, 208 



osmotic pressure of, 203 



take-up of radioactive iron, 95 

 Blood corpuscles, content of phosphate 



ions, 94 

 Boltzmann's constant, 2, 353 

 Boyle's law, 192 

 Bragg's law, 13 

 Bragg's spectrometer, 12 

 Brain potentials, 238-245 

 Brain waves, 238 



Brightness, changes in pupillary diame- 

 ter with, 115, 116 



defined, 113 



level in vision, 114, 126 



of source in signaling, 114 

 Broken ring of Landolt, 128 

 Brownian movement, awareness of, 266 

 Bunsen-Roscoe, absorption notation, 149 



Calcium tungstate x-ray screens, 50-52 

 Candle, standard, 113 

 Capitulum, of malleus, 268 



of stapes, 278 

 Castor oil, as a lubricant, 187 



purgative action of, 187 

 Cataracts, 120 



Cathode-ray oscillograph, 245 



sweep circuit, 249 



voltage sensitivity, 247 

 Cell, model of, 190, 204 



semi-permeability of, 35, 206, 209 

 Cell membrane, 204-206 

 Cell wall, 190 



Cenco-du Noiiy tensiometer, 185 

 Chlorophyll, 133 

 Cholesterol, 162 

 Chromatic aberration, 110 

 Chromatic difference of focus, 111, 322 

 Chromatism, 321 

 Chronaxie, 233, 234 

 Coalescence of liquid spheres, 177 

 Cochlea, 271, 283, 303, 304, 307 



mechanism, 286 



microphonics, 280, 301 



potentials, 280, 301 



wave, 304 

 Cod-liver oil, absorption, 162 

 Colloid, 187 



Color sensations, number of, 128 

 Color variables, 128 

 Color vision, theories, 129 

 Colorimeter, Duboscq, 152 



Fisher Scientific Company, 157 



Moll, 149 



monochromatic, 149, 150 



photoelectric, 155 

 Columella, 267 

 Compensating eyepiece, 330 

 Compton effect, 23, 26 

 Compton scattering, 14, 35, 39 

 Condenser, optical, 320, 326 

 Cone vision, 117 

 Conical shell vibrations, 264 

 Conjunctiva, inflammation, 118 

 Cooper Hewitt quartz mercury lamp, 138 

 Corex D glass, 141 

 Cornea, 103 



curvature, data, 101 

 reflections, 103 

 transmission, 117 

 Corti organ, 277, 282, 284, 285, 302, 303, 



305 

 Coupling, aural effects of, 274 

 mechanism, 270, 272, 302 

 model, 272 

 transmission results, 273, 276 



