SUBJECT INDEX 



Absolute rate theory of coUisional proc- 

 esses, 22 

 for intramolecular energy transfer, 32 

 for quenching processes, 40, 49 

 Absorbance, conversion to transmittance, 



254 

 Absorbancy, 146 

 Absorbancy index, 146 

 Absorptance, 146 

 Absorption, of acrylic resins, 190 

 of atmosphere, 129, 153 

 Beer's law, 144 

 Bouguer law, 144 

 coefficient, 144 



of copper sulfate solutions, 197 

 of Corex-D, 190 

 of ferrous ammonium sulfate solutions, 



197 

 of filters (see Filters) 

 of glass, 190 

 of Lucite, 190 



of multiple-component systems, 146 

 of Plexiglas, 190 

 of quartz, 129, 190 

 of silver chloride, 190 

 of single-component systems, 145-146 

 standard, 252 



spectral transmission, 253 

 of Vycor, 190 

 of water, 195-196 

 Absorption bands, width of, 76, 87, 88 

 Absorption coefficients, specific, of plant 



pigments, 354-358, 381, 382 

 Absorption curves, chlorophyll a, 404 

 chlorophyll b, 404 

 protochlorophyll, 404 

 protopheophytin, 405 

 of seedling extracts, 394, 395 

 Absorption maxima, protochlorophyll, in 

 crude extracts, 402 

 purified, in solutions, 402 

 in tissues, 402, 403 

 protopheophytin, 405 

 Absorption spectra (see Spectra) 

 Absorption wave length, relation of, to 

 classical theory, 75 

 to intensity, 113 



Absorption wave length, relation of, to 



molecular length, 75, 90 

 Absorptivity, molar, 146 

 Acanthopleura, ocelli, 637 

 Acanthostachijs strobilacea, 519 

 Acarina, ocelli, 645 

 Accommodation, in Alciopa, 633 



in cephalopods, 641-642 



in Onchidium, 641 



in Pterotrachea, 641 

 Accommodation coefficients, 28 

 Acetalddyde, 323, 540 

 Acetic acid, 319, 320, 323 

 Acid, indoleacetic, 468-472 

 Acid number of fats, 536 

 Acmaea, ocelli, 640 

 Acone ommatidium, 647 

 Acridium, bifocal ocelli, 645 

 Aciinoloba, photosensitivity, 628 

 Actinometer, ethvl chlorophyllide, 264, 

 287, 288 



transmission, 283, 287 



uranyl oxalate, 264 

 Action potentials, retinal, in cephalopod 

 eyes, 642, 664 

 in crustacean eyes, 663-664 

 in Limulus, 664 

 in Pecten, 064 

 Action spectra (see Spectra) 

 Acuity, visual, in compound eye, 658, 669 

 Adiabatic collision processes, 20 

 Adiabatic reactions, 3 

 Afterripening, definition, 520 



effect of, on photosensitivity, 534-535, 

 537, 541 

 Aggregated ocelli, 646 

 Agriolirnax, dark and light adaptation in, 



664 

 Agrostis, 527 

 Alanine, 317-319 

 Albinism, cause of, 435 

 Alciopa, accommodation, 633 



eyes, 632, 635 

 Aleuronids, compound eyes, 652 

 Algae, 393 



absorption spectra, 348-354, 359-364 



blue-green, 303, 306, 322n. 



brown, 303, 306 



chlorophyll production in dark, 396 



743 



