SUBJECT INDEX 



Aberrations, chromosomal, in animals, 



1167-1208 

 Absorption, curves, interpretation of, 

 54; X-ray, 48, 52 

 of energy, ionization, 307; by green 



leaves, 779, 841 

 of infra-red, by chlorophyll, 843 

 of light, by anthocyanins, 1116; by 



atoms, 15 

 lines, theory of, 19 

 quantum theory of, 1311 

 of radiation, 263; by proteins, 305 

 of salts, by roots, in re spectral regions, 



778 

 spectra, 258; of bacteria, 1130; of 

 chloroplast pigments, 1027-1032; 

 continua in, 18; of enzymes, 1153, 

 1158, 1159 

 of ultra-violet, by plant tissues, 874; 



by proteins, 305 

 in X-ray region, 22 



of X-rays and radium rays, by proteins, 

 307 

 Activation, of ergosterol, by ultra-violet, 

 323; discovery of, 324; physical 

 chemistry of, 327 

 of molecules, 253, 256 

 Adrenals, irradiation of, 505 

 Age, radiation and, with bacteria, 1135; 



with fungi, 893, 902, 907 

 Agglutinins, irradiation of, 367, 375 

 Agriolimax, response to light, 594 

 Air mass, definition of, 212 

 Alexin, inactivation, by ultra-violet, 356; 

 by X-rays and radium, 357 

 irradiation in vitro, 355-364; theoreti- 

 cal aspects, 358 

 irradiation in vivo, 371 

 Alpha particles, biological effects of, 

 559-572; on macroscopic structures, 

 562; on cells and cell organs, 564 

 ionization by, 559, 568 



Alpha particles, properties of, 559 



sources of, 560 

 Alterations, induced chromosomal, 1281- 



1295 

 Amoeba, response to light, 573 

 Amphibia, regeneration, 437; effects of 

 radium on, 438; effects of X-rays 

 on, 438 

 Anaphylaxis, 355, 370 

 Anatomical effects, in re photoperiodism, 



692 

 Aneuploidy, in plants, 1281, 1291 

 Angstrom, defined, 13 

 Anthocyanin, absorption bands of, 1116 

 formation, 1113; carbohydrate and, 

 1110; environment and, 1112; 

 radiation and, 1109-1118; tem- 

 perature and, 1113; ultra-violet 

 and, 878; visible spectrum and, 

 777 

 light transmission of, 1116 

 pigments, 110^1118 

 visible light and, 1110 

 Antibodies, irradiation of, 364-370, 372- 



378 

 Antigens, irradiation in vitro, bacterial, 

 353; protein, 354; tuberculin, 352; 

 venoms, 344; Wasserman, 353 

 Antirachitic vitamin, 324 

 Antitoxins, 370, 376 

 Arenicola, response to light, 587 

 Arthropods, color vision of, 599; orienta- 

 tion of, 597; response to light of, 595 

 Auxin, 1086 



B 



Bacteria, effects of radiation on, 1119- 

 1149; sunlight, 1120; ultra-violet, 

 1121; visible light, 1127; X-rays, 

 1135 

 fluorescence of, 1139 

 influence of pH in irradiation, 1128; of 

 temperature, 1127 



1331 



Vol. 1 contains pp. 1 to 676; Vol. 2, pp. 677 to 1330. 



