Vol. IV, No. 4 July, 1909 



PROCEEDINGS 



OF THE 



DELAWARE COUNTY 

 INSTITUTE OF SCIENCE 



Publication Committee : 



T. Chalkley palmer, Chairman; Henry h. Broomall, 



Trimble Pratt, M. D., Charles Potts, 



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



Carolus M. Broomall, Editor. 



Mkdia, Pa. 



Issued Quarterly. Subscription, One Dollar per annum in advance. 

 Address all correspondence to the Editor. 



Issued December 15th, 1909 



