Natural Sciences of Philadelphia 
39 
Lecture Hall with lectures by William L. Finley and Robert 
Cushman Murphy. 
Officers of the Section elected for 1921 are: 
Director .Spencer Trotter, M. D. 
Vice-Director .George Spencer Morris 
Recorder .Stevvardson Brown 
Secretary .William A. Shryock 
Treasurer and Conservator .W 7 itmer Stone. 
