788 



INDEX 



N 



Nectunis ; 



Phototropic response, effect of 

 temperature (Cole) 



569 

 Nerve : 



Cord of Liimbricus terres- 

 tris, chemical stimulation 

 (Moore) 29 



Nicotine : 



Invertebrate heart, action on 

 (Carlson) 559 



Nudibranch : 



Skin pigments (Crozier) 



303 



O 



Organization : 



Starfish egg (Chambers) 



41 

 Orientation : 



Stereotropic, of tube feet of 

 Asterias (Moore) 163 



— , of Asterias, inhibi- 

 tion by light (Moore) 



163 



— , of starfish (Moore) 



163 

 — , of starfish, inhibi- 

 tion by light (Moore) 



163 

 Osmosis: 



Electrical charges of colloidal 

 particles and anomalous 

 (Loeb) 463, 621 



Potential dififerences respon- 

 sible for anomalous (Loeb) 



213 

 Pressure, osmotic, of protein 

 solutions, influence of aggre- 

 gates (Loeb) 769 

 — , — , reciprocal relation 

 between viscosity of gelatin 

 solutions and (Loeb) 



97 

 — , — , regulation (Palmer, 

 Atchley, and Loeb) 



585 



Osterhout respiratory apparatus: 



Carbon dioxide, calibration for 

 absolute quantities (Parker) 



689 



Parthenogenesis : 



Artificial, formation of aster 

 (Chambers) Z2> 



Particle (s): 



Colloidal, electrical charges and 



anomalous osmosis (Loeb) 



463, 621 



— , origin of electrical charges 



(Loeb) 351 



Penetration : 



Cell, by acids (Crozier) 



723 

 Pepsin : 



Hydrolysis of gelatin (North- 

 rop) 57 

 Permeability : 



(Crozier) 723 



Conductivity and (Oster- 

 hout) 1 

 Determinations, direct (Oster- 

 hout) 275 

 — , indirect (Osterhout) 



275 

 Phagocytosis : 



Temperature coefficient (Fenn) 



331 

 Pharmacology : 



Protoplasm, animal and plant 

 (Macht and Livingston) 



573 

 Phototropism : 



Nectunis, effect of temperature 

 (Cole) 569 



Physics : 



Chemistry, physical, of pro- 

 teins (Cohn) 697 



Donnan equilibrium and 

 physical properties of pro- 

 teins (Loeb) 73 



