CONTENTS. 



Ludwig Kast and Emma M. Wardell: The urea content of the blood. 165 (1343). 



Rhoda Erdmann: Production of transplantable growth. 166 (1344). 



H. L. Abramson (by invitation): Immunization of monkeys against poliomyelitis- 



167 (1345)- 



William H. Park: Persistence of immunity following toxin-antitoxin injections. 



168 (1346)- 



Maurice H. Givens: The composition of dried vegetables with special reference to 



their nitrogen and calcium content. 169 (1347). 

 Barnett Cohen (by invitation): Observations on the production of experimental 



scurvy in guinea pig. 170 (1348). 

 E. R. Hoskins and M. M. Hoskins: Further experiments with thyroidectomy in 



Amphibia. 171 (1349)- 

 John Auer: Generalized analgesia in cats after exposure to a war-gas, (CH 3 ) 2 S04. 



172 (1350)- 



John Auer: Localized pulmonary edema in cats after inhalation of a war-gas, 



(CHsHSCu. 173 (I35i). 

 G. H. A. Clowes: On the electrical resistance and permeability of tumor tissues. 



174 (1352). 



G. H. A. Clowes: On the action exerted by antagonistic electrolytes on the elec- 

 trical resistance and permeability of emulsion membranes. 175 (1353). 



Robert A. Lambert and S. S. Samuels: The relationship of the leucocyte count 

 and bone-marrow changes in acute lobar pneumonia. 176 (1354) 



W. Ophuls and Elmer W. Smith: Anatomical changes produced by repeated in- 

 travenous injections of streptococci in rabbits. 177 (1355). 



Lillian J. Ellefson and Carl L. A. Schmidt: On serum proteins. 178 (1356). 



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