SUBJECTS 



789 



Physiology : 



Respiration of fishes in relation 

 to hydrogen ion concentra- 

 tion of medium (Powers) 



305 

 Pigment : 



Skin, in nudibranchs (Crozier) 



303 

 Plant: 



Protoplasm, comparative 



pharmacology of animal pro- 

 toplasm and (Macht and 

 Livingston) 573 



Polarity : 



Quantitative basis in regenera- 

 tion (Loeb) 447 

 Polyphemus : 



Limulus, relation of respiration 

 to rhvthm in cardiac ganglion 

 (Garrey) 149 



Potassium : 



Absorption, selective, by ani- 

 mal cells (Mitchell and 

 Wilson) 45 



— , — , — animal cells 

 (Mitchell, Wilson, and 

 Stanton) 141 



— , — , — animal cells, condi- 

 tions controlling (Mitchell 

 and Wilson) 45 



Retention by animal cells, con- 

 ditions controlling (Mitchell 

 and Wilson) 45 



Selection by animal cells, cause 

 as indicated by absorption 

 of rubidium and cesium 

 (Mitchell, Wilson, and 

 Stanton) 141 



Potential : 



Difference, observed and cal- 

 culated, of protein solutions 

 near isoelectric point, elim- 

 ination of discre[)ancies with 

 aid of buffer solutions (Loeb) 



617 



— responsible for anomalous 



osmosis (Loeb) 213 



Potential — Continued: 



Membrane, of protein solu- 

 tions, influence of aggregates 

 (Loeb) 769 



Precipitation : 



Casein, influence of electro- 

 lytes (Loeb and Loeb) 



187 

 Gelatin, influence of electro- 

 lytes (Loeb and Loeb) 



187 

 Pressure : 



Osmotic, of protein solutions, 

 influence of aggregates 

 (Loeb) 769 



— , reciprocal relation between 

 viscosity of gelatin solutions 

 and (Loeb) 97 



— , regulation (Palmer, 

 Atchley, and Loeb) 



585 

 Productus : 



Rhinobatus, stereotropic reac- 

 tions (Maxwell) U 

 Protein : 



Agglutination in presence of 

 (Northrop and De Kruif) 



655 

 — of bacteria by (Eggerth 

 and Bellows) 669 



Chemistry, physical (Cohn) 



669 

 Equilibrium between trypsin 

 and inhibiting substance 

 formed by its action on 

 (Northrop) 245 



Isoelectric, electrical charge 

 produced by tetravalent ion 

 (Loeb) 741 



— , produced by trivalcnt 



ion (Loeb) 741 



Physical properties and Don- 

 nan equilibrium (Loeb) 



73 



Solubililv at isoelectric point 



(Cohn) 697 



