SUBJECT INDEX 



1339 



Quantum yield, calculation of, 280; 



interpretation of, 281 

 Quartile limits, defined, 233 



R 



Radiation, effective quantitj^ of, 117; 

 effective intensity of, 110; influence 

 of matter on intensity of, 99; ions in 

 living matter and, 94 

 intensity, and inverse square law, 96 

 matter and, interaction of, 93; second- 

 ary phenomena, 101 

 sources of {see Black body), arc and 

 spark, 189, 190; carbon arc, 184; 

 commercial lamps, 183; helium 

 plus filter, 167; hydrogen plus 

 filter, 167; mercury arc, 154, 185- 

 187; mercury arc plus filter, 166; 

 sun, 171-180 {See also Solar 

 radiation); tungsten (radiance of), 

 137, (properties of) 181 

 types of, 257 

 Radio waves (short) {see Electric waves) 

 Radiometers, 145 



Radium, biological effects, qualitative, 

 459; quantitative, 461 

 effects on, chromosomal alternations, 

 1284, 1290; cleavage, 395; differ- 

 ential sensitivity in development, 

 401 ; embryonic development, 389- 

 410; fermentation, 988; fertiliza- 

 tion, 391; fungi, 907; gastrulation, 

 396; growth-response, 999; hered- 

 ity, 1004; mutation, 1263-1280; 

 permeability of protoplasm, 634; 

 physiological responses, 995; 

 plants, 987-1013; proteins, 307, 

 314; respiration, 988, 1001, 1065; 

 viscosity of protoplasm, 650 

 "fertiUzers," 991 

 measurement, 1, 81 

 regeneration effects, 411-457 {See also 



Regeneration) 

 units of intensity, 990 

 wave-length dependence of, 459; test 

 objects, 463 

 Radon, as source of alpha particles, 560 

 Raman effect, 37 



Ranunculus, effects of light on germina- 

 tion of, 805 

 Reaction, surface participation, 648, 654 



Vol. 1 contains pp. 1 to 676 



Reactions, photochemical, 253, 282 {see 



Photochemical reactions) 

 Reflection, of light, by leaves, 779 



of ultra-violet, by plant tissues, 874 

 Reflectors, 170 

 Refraction, 4 



Regeneration, effects of radium, in 



Amphibia, 438; in Chaetopoda, 435; 



in Hydrozoa, 419; in Tunicata, 437; 



in Turbellaria, 421 



effects of X-rays, in Amphibia, 437; in 



Chaetopoda, 435; in Hydrozoa, 



415; in Nemertina, 430; in Porifera, 



412; in Turbellaria, 419 



effects of X-rays and radium on, 411- 



457 

 physiological, as affected by X-rays 

 and radium, 450 

 Resonance radiation, 32 

 Respiration, effects of radiation on, in 

 fungi, 904, 908; in plants, 1059-1072 

 effects of radium on, 1065; ultra-violet 

 on, 1062; visible light on, 1059; 

 X-rays on, 972, 1063 

 Responses, of invertebrates to light, 573- 

 623 

 in re photoperiodism, 677 

 in re phototropism, 1074 

 of plants, to radium, 995 

 Reticulo-endothelial system, irradiation 



of, 481 

 Rhizopods, response to light, 573 

 Roentgen, definition of, 62; measurement 

 of, 66 

 ra3^s {see X-rays) 

 Roentgenometers, 68 

 Root development, effect of, light on, 

 733, 736, 744; X-rays on, 968 

 formation, in re photoperiodism, 689 



S 



Saltations, in fungi, 903, 906 



Salts, protective action of, in irradiation, 



1155 

 Sampling error, of frequency constants, 



237; of a percentage, 229 

 Saponins, irradiation of, 345 

 Scattering, of light, with change of 



frequency, 37; without change of 



frequency, 36 

 of X-rays, 39 

 ; Vol. 2. pp. 677 to 1330. 



