354 PROCEEDINGS OF THE ACADEMY OF [Dec., 
The following officers and committee were elected to serve for 
1918: 
Director Philip Laurent. 
Vice-Director R. C. Williams, Jr. 
Treasurer E. T. Cresson. 
Conservator Henry Skinner. 
Secretary J. A. G. Rehn. 
Recorder E. T. Cresson, Jr. 
Publication Committee E. T. Cresson, 
Philip P. Calvert, 
E. T. Cresson, Jr. 
E. T. Cresson, Jr., Recorder. 
Botanical Section.- —At the annual meeting of the Botanical 
Section, held November 19, 1917, officers for the ensuing year 
were elected as follows: 
Director Dr. Ida A. Keller. 
Vice-Director Joseph Crawford. 
Recorder Dr. John W. Eckfeldt. 
Conservator and Treasurer .Stewardson Brown. 
Stewardson Brown, Conservator. 
Mineralogical and Geological Section. —The Section held 
three meetings with the usual interested attendance. Prof. Florence 
Bascom discussed the Geology of Mt. Desert. Miss Emma Walter 
called attention to remarkable erosion of limestone near Devault. 
There was also discussion of isostasy and the Himalayas, and other 
subjects. 
There were four field excursions, with an average attendance of 
about seventeen. The parties visited: 1. The crystalline rocks 
near Unionville and Northbrook, Chester County; 2. The crystalline 
rocks near Rocky Run and Dismal Run, Delaware County; 3. The 
Cambrian quartzites and the limestones between Westtown and 
Brinton’s Bridge, Chester County; 4. The limestone exposures 
between Devault and Malvern, Chester County. 
The following were elected officers of the Section for 1918: 
Director Benjamin Smith Lyman. 
Vice-Director F. J. Keeley. 
Recorder and Secretary W. B. Davis 
Treasurer W. B. Davis. 
Conservator F. J. Keeley. 
Benjamin Smith Lyman, Director. 
