/^OL. V No. 16 



October 4, 1915 



JOUENAL 



OF THE 



WASHINGTON ACADEMY 



OF SCIENCES 



BOARD OF EDITORS 

 Fred. E. Wright Wiluam R. Maxon Edson S. Bastin 



OPHTBICAL LABORATOBT NATIONAL UX7SSnM QBOLOQICAL BT7BV«T 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST. AND SEPTEMBER, WHEN MONTHLY. 



BT THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



THE WAVERLY PRESS 



BALTIMORE, MD. 



