Vm CONTENTS 



Cole, William H. The effect of temperature on the phototropic 

 response of Necturus 569 



Macht, David I., and Livingston, Marguerite B. Effect of 

 cocaine on the growth of Lupinus alhus. A contribution to 

 the comparative pharmacology of animal and plant proto- 

 plasm 573 



Palmer, Walter W., Atchley, Dana W., and Loeb, Robert F. 

 Studies on the regulation of osmotic pressure. II. The effect 

 of increasing concentrations of albumin on the conductivity of 

 a sodium chloride solution 585 



Loeb, Robert F., Atchley, Dana W., and Palmer, Walter W. 

 On the equilibrium condition between blood serum and serous 

 cavity fluids 591 



Hitchcock, David L The colloidal behavior of edestin 597 



Loeb, Jacques. The elimination of discrepancies between ob- 

 served and calculated p.d. of protein solutions near the iso- 

 electric point with the aid of buffer solutions 617 



Loeb, Jacques. Electrical charges of colloidal particles and 



anomalous osmosis. II. Influence of the radius of the ion. . . 621 



No. 6, July 20, 1922. 



Northrop, John H. The stability of bacterial suspensions. I. 



A convenient cell for microscopic cataphoresis experiments . . 629 

 Northrop, John H., and Cullen, Glenn E. An apparatus for 



macroscopic cataphoresis experiments 635 



Northrop, John H., and De Kruif, Paul H. The stability of 



bacterial suspensions. II. The agglutination of the bacillus 



of rabbit septicemia and of Bacillus typhosus by electrolytes . 639 

 Northrop, John H., and De Kruif, Paul H. The stability of 



bacterial suspensions. III. Agglutination in the presence 



of proteins, normal serum, and immune serum 655 



Eggerth, Arnold H., and Bellows, Margaret. Thefloccula- 



tion of bacteria by proteins 669 



Schmidt, Carl L. A., and Norman, G. F. Further studies in 



eosin hemolysis 681 



Parker, G. H. The calibration of the Osterhout respiratory 



apparatus for absolute quantities of carbon dioxide 689 



