696 



THE JOURNAL OF GENERAL PHYSIOLOGY 



Egg — conlimied: 



Nereis, relative physiological 

 effects of 7-rays upon (Red- 

 field and Bright) 25 

 Electrification: 



Water (Loeb) 87 



— , influence of concentration 



of electrolytes on (Loeb) 



173 



— , slight modification of 



collodion membrane on sign 

 (Loeb) 255 



Electrolyte : 



Concentration, influence on 

 electrification of water 

 (Loeb) 173 



Influence of concentration of, 

 on some physical properties 

 of colloids (Loeb) 273 



of, on some physical 



properties of crystalloids 

 (Loeb) 273 



Equilibrium: 



(Maxwell) 123, 349 



Energy: 



Free, of biological processes 

 (Linhart) 247 



Enzyme: 



(Northrop) 113 



Action (McGuire and Falk) 



215 

 — in Echinodontium tinc- 

 torimn Ellis and Everhart 

 (Schmitz) 613 



Effect of concentration of, on 

 rate of digestion of proteins 

 by pepsin (Northrop) 



471 

 Eictract: 



Catalase, from marine algae, ki- 

 netic action (Hampton and 

 Baas-Becking) 635 



Eye: 



Human, dark adaptation of 

 (Hecht) 499 



Facet: 



Number, change in bar gene of 

 Drosophila involving decrease 

 in (Zeleny) 69 



— , effect of temperature on, in 

 bar-eyed mutant of Droso- 

 phila (Krafka) 



409, 433, 445 

 Feeding : 



Iodine, quantitative experi- 

 ments (Swingle) 161 

 Frogs : 



Parthenogenetic, chromosomes 

 of (Parmenter) 205 



Gene: 



Bar, of Drosophila, change in, 

 involving decrease in facet 

 number (Zeleny) 69 



— , , change in, involving 



increase in dominance (Ze- 

 leny) 69 

 Gravity : 



Nature of directive influence 

 of, on arrangement of or- 

 gans in regeneration (Loeb) 



373 

 Growth: 



Differential, tension of, as a 

 stimulus to myogenesis 

 (Carey) 357 



Rate, nature of (Reed) 



545 

 H 

 Heat: 



Production, during lumines- 

 cence of Cypridina luciferin 

 (Harvey) 137 



Heliotropism : 



Onchidium, analysis of animal 

 conduct (Crozier and Arey) 



107 

 Heredity: 



Hereditary adaptation of or- 

 ganisms to higher tempera- 

 ture (Northrop) 313 



