PROCEEDINGS 



OF THE 



Delaware County Institute of Science 



Carolus M. Broomall, Editor. 



Publication Committee : 



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



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



M. H. Hoyt, Edward V. Streeper. 



Volume VIII 



Media, Pa. 



