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 Plankton of the San Joaquin 

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P. Blakiston's Son & Co., Philadelphia 



The Journal of General Physiology 



EDITED BY 

 JACQUES LOEB, New York, N. Y. W. J. V. OSTERHOUT, Cambridge, Mass. 



CONTENTS OF VOLUME III, No. 3, JANUARY 20, 1921 



PfiZABD, A. Numerical law of regression of certain secondary sex characters. 



HBCHT, Selig. Photochemistry of visual purple. II. The effect of temperature on the bleaching 



of visual purple by light. 

 EcKWBiLEB, Heebeet, Noyes, HELEN MiLM}B, and Falk, K. Geoege. The amphoteric properties of 



some amino-acids and peptides. 

 ConLTEE, Calvin B. The Isoelectric point of red blood cells and its relation to agglutination. 

 ZOLLBE, Haepbe F., and Claek, W. Mansfield. The production of volatile fatty acids by bacteria 



of the dysentery group. 

 MooEB, A. R,, and Cole, W. H. The response of Papilla japonica to light and the Weber-Fechner law. 

 Beooks, Matilda Moldbnhaoee. Comparative studies on respiration. SIV. Antagonistic action 



of lanthanum as related to respiration. 

 H'ABEis, J. Aethue, Goetner, Ross Aiken, and I/Awkeincb John V. On the differentiation of the 



leaf tissue fluids of ligneous and herbaceous plants with respect to osmotic concentration and 



electrical conductivity. 

 tjHLBNHUTH, Eduaed. Experimental production of gigantism by feeding the anterior lobe of the 



hypophysis. 

 HBCHT, Selig. Time and intensity in photosensory stimulation. 

 Hecht, Selig. The relation between the wave-length of light and its effect on the photo-sensory 



process. 

 LOBB, Jacques. Ion series and the physical properties of proteins. III. The action of salts in low 



concentration. 



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