CONTENTS. 



Gary N. Calkins : The effect of chemicals on the division rateof protozoa. 7o(679). 



E. M. EwiNG : The first onflow and diastolic waves in the venous pulse. 71 (680). 

 J. Auer and S. J. Meltzer : The effect of the infundibular portion of the hypophysis 



upon vaso-dilators. 72 (681). 

 I. S. Kleiner and S. J. Meltzer : On the reduction of toxicity of strychnine by the 



simultaneous administration of large quantities of fluid. 73 (682). 

 S. J. Meltzer : The influence of the infundibular portion of the hypophysis upon the 



pupil. 74 (683). 



A. M. Banta : Observations on the relation of oxygen and carbon dioxide to the 



development of certain amphibian embryos. 75 (684). 

 R. A. Lambert : Direct observation of cell division in mammalian tissue. 76 (685). 



C. E. A. Winslow and F. Abramson : The effect of drying upon the viability of 



bacteria. 77(686). 



S. R. Benedict and J. R. Murlin : Determination of the amino-acid nitrogen in the 

 urine. 78 (687). 



P. A. LEVENEand D. D. Van Slyke : Ficrolonatesofthemonoamino-acids. 79 (688). 



D. D. Van Slyke : Demonstration of improved method for determination of amino 



nitrogen. 80 (689). 



D. D. Van Slyke and F. J. Birchard : The nature of the free amino nitrogen groups 



in the native proteins. 81 (690). 

 R. Weil and A. F. CoCA : An experimental study of anti-anaphylaxis. 82 (691). 

 W. F. Manwaring : The toxicity of foreign leucocytes. 83 (692) 

 R. A. Gortnlr : The occurrence and significance of tyrosinase in the reproductive 



organs of certain amphibians. 84 (693). 

 R. A. Gortner : On two different types of melanins. 85 (694). 

 L. L. Woodruff : A five year pedigree culture of paramaecium without conjugation. 



86 (695). 



F. P. Underhii.l : The influence of tartrates upon phlorhizin diabetes. 87 (696). 



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