Contents : 



The Sluggish Diatom, By T. Chalkley Palmer, Page 131 



A Bacteriological Examination of the Delaware 

 River Water, By Howard Walker Fields 



and Percy Elwood Mebus, - - - "138 



Rabies, By John Reichel, V. M. D., - - - " 141 



Trees and Shrubs of the Court House Lawn, Media, " 155 



The Thermodynamics of Elastic Bodies, 



By C. M. Broomall, - - - - " 160 



Minutes, Institute, - - - - - - "165 



Minutes, Section A, " 167 



Institute Notes, - - - - - - - " 172 



