yi CoP >) 
yo 
VOL. XXXITI MARCH, 1918 No. 3 
THE JOURNAL 
PRA 
OF 
BIOLOGICAL CHEMISTRY 
FOUNDED BY CHRISTIAN A. HERTER AND SUSTAINED IN PART BY THE CHRISTIAN A. HBRTER 
MEMORIAL FUND 
EDITED BY 
H. D. DAKIN, New York, N. Y. A. N. RICHARDS, Philadelphia, Pa. 
E. K. DUNHAM, New York, N. Y. DONALD D. VAN SLYKE, New York, N.Y. 
LAFAYETTE B. MENDEL, New Haven, Conn. CLARENCE J. WEST, New York, N. Y. 
WITH THE COLLABORATION OF 
J. J. ABEL, Baltimore, Md. P. A, LEVENE, New York, N. Y. 
STANLEY R. BENEDICT, New York, N. Y. JACQUES LOEB, New York, N. Y. 
R. H. CHITTENDEN, New Haven, Conn. A. S. LOEVENHART, Madison, Wis. 
OTTO FOLIN, Boston, Mass. — GRAHAM LUSK, New York, N. Y. 
WILLIAM J. GIES, New York, N. Y. E. V. McCOLLUM, Baltimore, Md. 
L. J. HENDERSON, Cambridge, Mass. A. B. MACALLUM, Toronto, Canada. 
REID HUNT, Boston, Mass. J. J. R. MACLEOD, Cleveland, Ohio. 
W. A. JACOBS, New York, N. Y. JOHN A. MANDEL, New York, N. Y. 
WALTER JONES, Baltimore, Md. A. P. MATHEWS, Chicago, Ill. 
ANDREW HUNTER, Toronto, Canada. . F. G. NOVY, Ann Arbor, Mich. 
THOMAS B. OSBORNE, New Haven, Conn. 
T. BRAILSFORD ROBERTSON, Berkeley, Cal. 
P. A. SHAFFER, St. Louis, Mo. 
A. E. TAYLOR, Philadelphia, Pa. 
F, P. UNDERHILL, New Haven, Conn. 
V. C. VAUGHAN, Ann Arbor, Mich. 
ALFRED J. WAKEMAN, New Haven, Conn. 
PUBLISHED MONTHLY 
BY THE ROCKEFELLER INSTITUTE FOR MEDICAL RESEARCH 
FOR THE JOURNAL OF BIOLOGICAL CHEMISTRY, INC. 
AT 2419-21 GREENMOUNT AVENUE, BALTIMORE, MD. 
Copyright 1918 by The Journal of Biological Chemistry 
Entered as second-class matter, August 1, 1911, at the Post Office at Baltimore, Md., under the 
Act of March 3, 1879 
