1918.] NATURAL SCIENCES OF PHILADELPHIA. 357 



tributors. Interesting communications were made by R, C. Wil- 

 liams, Jr., J. A. G. Rehn, P. P. Calvert, Henry Skinner, Philip Lau- 

 rent, Herman Hornig, Dr. P. W. Whiting, and Dr. J. Bequaert. 

 The following officers and committee were elected to serve for 1919: 



Director Philip Laurent. 



Vice-Director R. C. Williams, Jr. 



Treasurer E. T. Cresson. 



Conservator Henry Skinner. 



Secretary J. A. G. Rehn. 



Recorder George M. Greene. 



Publication Committee E. T. Cresson, 



Philip P. Calvert, 

 E. T. Cresson, Jr, 



E. T. Cresson, Jr., Recorder. 



Botanical Section. — The following officers were elected to serve- 

 during the year 1919 : 



Director Joseph Crawford. 



Vice-Director Alexander MacElwee. 



Recorder John W. Eckfeldt, M.D. 



Treasurer Stewardson Brown. 



Conservator Stewardson Brown. 



John W, Eckfeldt, M.D., Recorder. 



Mineralogical and Geological Section. — The Section held 

 four meetings, with the usual attendance. Prof. Wright discussed 

 the topography of the upper James River; there were also discussions 

 of peat growth, and of Tertiary coal. Other mineralogical and geologi- 

 cal matters were discussed. 



The Section made six field excursions with an average attendance 

 of eleven. The excursions were not formally announced, but were 

 orally noted. The excursions were all in the crystalline region of 

 Delaware County, except one in that of the Gulph region of Mont- 

 gomery County. 



The deaths of Prof. Carter, Mr. Schumo, Mr. DuBois and Joseph 

 Willcox were announced. They were active members of the Section, 

 and particularly interested in the field excursions. Mr. DuBois 

 was for many years an efficient member of the excursion committee. 



