CONTENTS. 



44 (187). A study of the vital conditions determining the distribution and evolu- 

 tion of snails in Tahiti, with illustrations. By H. E. Crampton. 



45 (188). The parathyroid gland, with demonstrations of the effects of hypo- 

 dermic injections of parathyroid nucleoproteid after parathyroidectomy. By S. P. 



Beebe. 



46 (189). Further experimental and clinical observations on the transfusion of 



blood. By George W. Crile. 



47 (190). A preliminary report on the direct transfusion of blood in animals 

 given excessive doses of diphtheria toxins. By George W. Crile and D. H. Dolley. 



48 (191). The effect on the normal dog heart of expressed tissue juice from 

 hearts of dogs poisoned with diphtheria toxin. By J. J. R. Macleod and George 



W. Crile. 



49 (192). Experimental liver necrosis: I. Hexon bases. By Holmes C. 



Jackson and Richard M. Pearce. 



50 (193). The action of nitric acid on the phosphorus of nucleoproteids and 

 paranucleoproteids. By A. B. Macallum. 



51 (194). Does the stomach of the dog contain free hydrochloric acid during 



gastric digestion? By Lafayette B. Mendel. 



52 (195). On the nature of the process of fertilization. By Jacques Loeb. 



53 (196). Comparative chemical composition of the hair of different races. By 



Thomas A. Rutherford and Philip B. Hawk. 



54 (197). The oxidation of sugars by cupric acetate-acetic acid mixtures. 



By A. P. Mathews and Hugh McGuigan. 



55 (198). Observations on the effects of fasting upon the opsonic power of the 

 blood to staphylococcus aureus. By Allan C. Rankin and A. A. Martin (by 

 invitation). 



56 (199). The automatism of the respiratory center. By G. N. Stewart and 

 F. H. Pike. 



57 (200). A series of spontaneous tumors in mice. By E. E. Tyzzer. 



58 (201). Concerning the neutrality of protoplasm. By Lawrence J. Hen- 

 derson (by invitation). 



59 (202). The influence of adrenalin upon the venous blood flow. By Russell 



Burton-Opitz. 



60 (203). The viscosity of laked blood. By Russell Burton-Opitz. 



61 (204). The determination of ammonia and urea in blood. By W. McKim 



Marriott and C. G. L. Wolf. 



62 (205). The resolution of fibrinous exudates, with exhibition of specimens. 



By Eugene L. Opie. 



63 (206). Extirpation of both kidneys from a cat and transplantation of both 

 kidneys from another cat, with exhibition of specimens. By Alexis Carrel. 



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