PROCEEDINGS 



OF THE 



Delaware County Institute of Science 



Carol us M. Broomall, Editor 



Publication Committee : 



T. Chalkley Palmer, Chairman ; Trimble Pratt, M. D., 



J. C. Starbuck, M. D., B. M. Underbill, V. M. D. 



Volume VI: October, 1910, to July, 1911 



Media, Pa. 



