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 . 
Vice-Director . 
Treasurer . 
Conservator . 
Secretary . 
Recorder . 
Publication Committee 
Philip Laurent. 
R. C. Williams, Jr. 
E. T. Cresson. 
Henry Skinner. 
J. A. G. Rehn. 
George M. Greene. 
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 
Whllcox 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. 
