SUBJECT INDEX 



899 



Quail, bobwhite 



effect of light on, 753 



juvenile reproductive response of, 



756 

 ovarian stimulation, 755 

 oviduct stimulation, 755 

 rest period, 755 



postlaying, 755 



Radiant energy; see also Irradiation; 

 Light; Radiation 



intensity and time relationships on 

 photomorphogenesis and pho- 

 toperiodism, 457 



log-energy response in photo- 

 morphogenesis, 455, 457 



morphogenetic effects in Hyoscy- 

 amus, 113-119 



spectral effects in Hyoscyamus, 

 111-119 



spectral effects in lettuce leaves, 

 119-125 



spectral effects on morphogenesis, 

 111-127 



threshold for photomorphogene- 

 sis, 457, 458 



uhraviolet, 801 

 Radiation 



blue, without detectable traces of 

 near infrared, 1 15 



effect of near infrared, 115-118, 

 120, 126 



morphogenic effects and GA rela- 

 tions, 351 



spherical meter, 112 



supplementary, 120 



affected by intensity of basic 

 light period, 120 

 Reflex, conditioned, 859 

 Refractive index 



of pigment particles, 19 

 Refractoriness, 752, 753 



in fish, 653, 657, 662, 663 



to effect of gonadotropins, 662 

 experimental fish, 657 

 influence of long days, 653, 

 657 

 relative, in adult quail hens, 756 

 Refractory period, 645, 739 

 definition, 692 

 in perching birds, 752 

 regulation by day length, 692- 



698 

 regulation by light and darkness, 



696-698 

 role in tropical migrants, 682 

 testicular, 731-735 

 Refractory state 



of photoperiodic response mecha- 

 nism, 731-735 

 Regeneration, 393, 402 

 Reproductive cycles 



in marine animals, 625-632 

 Reproductive dormancy, 593 

 Reproductive response 



to interrupted dark period, 751, 

 752, 754 

 Reptiles 



photoperiodism in, 669-675 

 Respiratory enzyme 



identified by its action spectrum, 

 25 

 Rest period 



in postlaying, 755 

 in quail, 755 

 Rhythm, 805-807, 810, 811, 818, 

 819, 822-824, 828, 829, 842, 

 845, 847-852, 855, 866, 867 

 activity, 791-800 

 in bat, 799 

 in chipmunk, 797 

 in mammals, 791-800 

 in mouse (Peromyscus), 792- 



794 

 running wheels, as measure of 

 rodent, 791, 792 



