PROCEEDINGS 



OF THE 



Delaware County Institute of Science 



Carolus M. Broomall, Editor. 



Publication Committee : 



T. Chalkley Palmer, Chairman ; Henry L. Broomall, 



Trimble Pratt, M. D., Charles Potts, 



B. M. Underhill, V. M. D. 



Volume IV: October, 1908, to July, 1909 



Media, Pa. 



