CONTENTS 



Hecht, Selig. The nature of foveal dark adaptation 113 



Mitchell, Philip H., Wilson, J. Walter, and Stanton, Ralph 

 E. The selective absorption of potassium by animal cells. 

 11. The cause of potassium selection as indicated by the ab- 

 sorption of rubidium and cesium 141 



Garrey, Walter E. The relation of respiration to rhythm in the 



cardiac ganglion of Limulus polyphemus 149 



Smith, Edith Philip. Comparative studies on respiration. XIX. 



A preliminary stage in the progress of ether anesthesia 157 



Moore, A. R. Stereotropic orientation of the tube feet of 



starfish (Asterias) and its inhibition by light 163 



Inman, O. L. Comparative studies on respiration. XX. The cause 



of partial recovery 171 



Brooks, Matilda Moldenhauer. The effect of hydrogen ion con- 

 centration on the production of carbon dioxide by Bacillus 

 buiyricus and Bacillus suhtilis 177 



Loeb, Jacques, and Loeb, Robert F. The influence of electro- 

 lytes on the solution and precipitation of casein and gelatin 187 



Loeb, Jacques. The origin of potential differences responsible for 



anomalous osmosis 213 



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