I VOLUME 2 AUGUST, 1916 NUMBER 8 | 
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I . I 
I PROCEEDINGS 1 
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i OF THE . I 
I National Academy | 
[ OF Sciences f 
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I OF THE j 
I UNITED STATES OF AMERICA I 
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I EDITORIAL BOARD 
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i Arthur A. Noyes, Chairman Edwin B. Wilson, Managing Editor 
I Arthur L. Day, Home Secretary George E, Hale, Foreign Secretary 
I J. J. Abel J. M. Coulter W. H. Holmes 
1 W. B. Cannon C. B. Davenport J. P. Iddings 
I J. McK. Cattell Simon Flexner R, A. Millikan 
I J. M. Clarke E. B. Frost E. H. Moore '■ - . ^ 
~ . E. G. CoNKLiN R. G. Harrison Alexander Smith 
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I Publication Office: Williams & Williins Company, Baltimore | 
1 Editorial Officer Massachusetts Institute of Technology, Boston 5 
1 Home Office of the Academy: Washington, D. C. I 
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Ent^ed as second-class matter at the Post Office at Baltimore, Md., tinder the Act of August 24, ISHZ 
