786 



INDEX 



Hydrolysis : 



Gelatin, by acid (Northrop) 



57 

 — , — alkali (Northrop) 



57 

 — , — pepsin (Northrop) 



57 

 — , — trypsin (Northrop) 



57 

 Hypophysis: 



Anterior lobe, influence on size 

 of Amby stoma tigrinum of 

 feeding (Uhlenhuth) 



321 



Immunity : 



Serum, immune, agglutination 

 in presence of (Northrop 

 and De Kruif) 655 



Inactivation : 



Trypsin (Northrop) 



227, 245, 261 



— , spontaneous (Northrop) 



261 

 Inhibition : 



Equilibrium between trypsin 

 and inhibiting substance 

 formed by its action on pro- 

 teins (Northrop) 245 



Metamorphosis of thymus-fed 

 salamanders, role of iodine 

 (Uhlenhuth) 319 



Stereotropic orientation of 

 tube feet of Asterias, by 

 light (Moore) 163 



tube feet of starfish, 



by light (Moore) 163 



Intensity : 



Stereotropism of dogfish, rever- 

 sal through change of inten- 

 sity of stimulus (Maxwell) 



19 



— — Mustelus calif ornicus, 

 reversal through change of 

 intensity of stimulus (Max- 

 well) 19 



Invertebrate : 



Heart, action of atropine 

 (Carlson) 559 



— , — — curare (Carlson) 



559 



— , nicotine (Carlson) 



559 

 Iodine : 



Salamander larvae, effect on, of 

 (Uhlenhuth) 319 



— , thymus-fed, role of iodine 

 in inhibition of metamor- 

 phosis (Uhlenhuth) 



319 

 lodothjTin : 



Salamander larvae, effect on, 

 of (Uhlenhuth) 319 



Ion: 



Radius (Loeb) 621 



Salts with tetravalent ions, 

 ionizing influence on crystal- 

 line egg albumin at isoelec- 

 tric point (Loeb) 759 



— — trivalent ions, ionizing 

 influence on crystalline egg 

 albumin at isoelectric point 

 (Loeb) 759 



Tetravalent, electrical charge 

 produced oji isoelectric pro- 

 tein by (Loeb) 741 



— , ionizing influence on crys- 

 talline egg albumin at isoelec- 

 tric point of salts with 

 (Loeb) 759 



Trivalent, electrical charge pro- 

 duced on isoelectric protein 

 by (Loeb) 741 



— , ionizing influence on crys- 

 talline egg albumin at iso- 

 electric point of salts with 

 (Loeb) 759 



Isoelectric : 



Protein, electrical charge pro- 

 duced by tetravalent ion ' 

 (Loeb) 741 



— , produced by trivalent 



ion (Loeb) 741 



