SUBJECTS 



699 



Onchidium : 



Heliotropism of, analysis of 

 animal conduct (Crozier 

 and Arey) 107 



Organ : 



Arrangement, in regeneration, 

 nature of directive influence 

 of gravity on (Loeb) 



373 

 Otolith, effect of removal of 

 (Maxwell) 123 



Organism : 



Hereditary adaptation of, to 

 higher temperature (North- 

 rop) 313 

 Organization : 



Neuromuscular, stereotropism 

 as function of (Moore) 



319 

 Origin: 



Adrenalin-secreting system 



(Gaskell) 73 



Sympathetic system (Gaskell) 



73 

 Vascular muscles (Gaskell) 



73 

 Osmosis: 



Osmotic pressure (Loeb) 



87 

 Oxidase : 



(Hampton and Baas-Becking) 



635 

 Activity, apparatus for meas- 

 urement (Harvey) 253 

 Oxylucif erin : 



Cypridina, action of acid in 

 reduction of (Harvey) 



207 



— , light in reduction of 



(Harvey) 207 



Parthenogenesis : 



Chromosomes of parthenoge- 

 netic frogs (Parmenter) 



205 



Penicillium : 



chrysogenum, effect of hydro- 

 gen ion concentration on 

 respiration of (Gustafson) 



617 

 Pepsin : 



Effect of concentration of en- 

 zyme on rate of digestion of 

 proteins by (Northrop) 



471 



Quantitative determination 



(Northrop) 113 



Rate of hydrolysis of proteins 



by, influence of substrate 



concentration (Northrop) 



595 

 Solutions, influence of hydro- 

 gen ion concentration on the 

 inactivation of (Northrop) 



465 

 Permeability : 



Plant cells, effect of anions on 

 (Raber) 535 



Photochemistry : 



Photochemical nature of 

 the photosensory process 

 (Hecht) 229 



Photoreception : 



Process (Hecht) 337 



Photosensory : 



Process, photochemical nature 

 of (Hecht) 229 



Physiology : 



Relative physiological effects of 

 j8-rays of different velocities 

 (Redfield and Bright) 



31 



of /3-rays upon the egg 



of Nereis (Redfield and 

 Bright) 25 



of 7-rays upon the 



egg of Nereis (Redfield and 

 Bright) 25 



Significance of cambium in the 

 study of certain physiologi- 

 cal problems (Bailey) 



519 



