CONTENTS. 
H. C. Sherman and R. O. Gettler : The balance of acid-forming and base -forming 
elements in foods, and its relation to ammonia metabolism. 71 (596). 
E. C. Kendall : The determination of small amounts of iodin in organic combination. 
A modification of Hunter's method. 72 ( 597 ). 
L. L. Woodruff and G. A. Baitsell : Beef extract as a culture medium for Parame- 
cium aurelia. 73. (598). 
G. A. Baitsell (by invitation) : Conjugation between closely related individuals of 
Stylonychia. 74 (599). 
R. A. Lambert and F. M. Hanes : The cultivation of tissue in plasma from alien 
species. 75 (600). 
L. B. Mendel and A. L. Daniels : The behavior of fat-soluble dyes in the organism. 
76 (601). 
W.C.Rose: Experimental studies on Creatine and Creatinine. 77 (602). 
Peyton Rous : The rate of tumor growth in underfed hosts. 78 (603). 
L. W. Famulener : Preliminary report upon the transmission of haemolysins from 
mother to offspring. 79 (604). 
J. Rosenbloom and W. Weinberger : The effects of intra-peritoneal injections of 
adrenalin on the partition of nitrogen in the urine of dogs. 80 (605). 
E. Boas and J. Rosenbloom : Experiments on the diffusibility of cholesterol-esters and 
of lecithan compounds. 8 1 ( 606 ) . 
Moyer S. Fleisher and Leo Loeb : The relative importance of stroma and paren- 
chyma in the growth of certain organs in culture media. 82 (607). 
L. B. Stookey: A possible significance of the Cammidge reaction. 83 (608). 
F. P. Gay : The relation of the fixation reaction to specific precipitation. 84 (609). 
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