SUBJECT INDEX 



1341 



Terms, 21 



Tetraploids, in re irradiation, 1288, 1289 



Thermocouple technique, 144 



Thermopiles, 277 



Toxins, bacterial, in vitro irradiation, 347 



Toxisterol, 330, 332 



Translocations, chromosomal, 1284, 1291; 



reciprocal, 1169, 1178; simple, 1169, 



1178 

 Transmission, by leaves, of spectral 



regions, 779 

 of ultra-violet, by glass screens, 869 

 Transmutation, by X-rays, in plants, 



1273 

 Transpiration, effects of, light intensity 



on, 752; radiation on, in fungi, 904 

 of green plants, in infra-red, 846 

 by leaves, in re regions of spectrum, 773 

 Triploids, in re irradiation, 1288, 1289 

 Trisomies, in re irradiation, 1290 

 Tropisms, in fungi, in re radium, 909 



{See Motor responses and Phototro- 

 pism) 

 in response to radium, 994, 999 

 Tubers, formation, in re photoperiodism, 



689 

 Tubicolous annelids, response to light, 



587 

 Tungsten, properties of, 181; radiance, 



137 

 Tungsten filament, radiation source, 180 

 Tunicata, regeneration of, 436; effects of 



radium on, 437 

 Turbellaria, regeneration of, 419; effects 



of radium on, 421; effects of X-rays 



on, 419 

 response to light, 590 



U 



Ultra-violet, 15 



absorption, by bacteria, 1130; by 

 enzymes, 1153, 1158; by proteins, 

 305; and reflection, by plant tis- 

 sues, 874 



anthocyanin formation and, 878, 1114 



chemical reactions and, 257 



dayUght-lacking, effects on seed plants, 

 863 



effects on, anatomical structure, 877; 

 bacteria, 1121; chlorophyll, 878, 

 1099; emulsoids, 310; enzymes, 

 1152; fermentation, 1068; flower 



Vol. 1 contains pp. 1 to 676 



formation, 877; fungi, 889; ger- 

 mination, 853; mature plants, 860; 

 media, 1 129; permeability of proto- 

 plasm, 633, 645; photosynthesis, 

 1039; plant tissues, 829, 834; 

 proteins, 305, 310; respiration, 

 1062; seed plants, 853-887; sus- 

 pensoids, 308 

 ergosterol, irradiation with, 323 

 fluorescence of plant parts and, 876 

 measurement of, 123, 192, 197, 201; 



from the sun, 176-179 

 mitogenetic source of, 919, 920 

 phenomena, 201 

 plus daylight, effects on seed plants, 



864 

 short wave, effects on seed plants, 861 

 special glass transmitting, 869 

 of sunlight, 176 

 Units, 131; A, wave-length, etc., 13; 

 measurements and, 130 



Vacuolization, 649, 654, 657 



Venoms, irradiation in vitro, 342; in vivo, 

 376-377 



Visibility, relative, 132; maximum abso- 

 lute, 133; sensitivity curve of, 200 



Visible light {see Light, visible) 



Vision, of Daphnia, 599; of insects, 610; 

 sensitivity curve of, 200 



Vitamin, antirachitic, 324 



Vitamin D, 323, 324, 329-331; multiple 

 nature of, 326, 333; origin in nature; 

 333; production, from ergosterol, 323 



Vitamins, and radiation, 323-340 



Volvox, response to light, 582 



W 



Water, transmission, 163; transmissive 



exponents, 126 

 Wave-length, effect on photosynthesis, 

 1038 

 and intensity distribution, of radiation, 



153 

 mitogenetic radiation and, 919, 938 

 monochromatic measurement of, 8 

 photochemical influence of, 272 

 units of, 13 



of X-rays, biological dependence, 459 

 ; Vol. 2, pp. 677 to 1330. 



