426 [March 7, 
American Journal of Pharmacy; Pennsylvania Magazine; 
American Bar Association; Mercantile Library, Philadel- 
phia; Haverford College; Wyoming Historical and Geologi- 
cal Society; Second Geological Survey of Pennsylvania; 
Pennsylvania Secretary of Internal Affairs; Richard Vaux, of 
Philadelphia; American Journal of Mathematics; United 
States Light-house Board; Bureau of Education; Dr. Hay- 
den’s Geological Survey; Colonel Charles W. Whittlesey ; 
American Antiquarian Society, Chicago; Richard Mansill, 
Rock Island; the University of Michigan; Wisconsin State 
Historical Society; and the San Francisco Mercantile Library 
Association, 
A letter from Mr. Jedediah Hotchkiss, Staunton, Va., was 
read, requesting permission to have photographs taken of the 
plates of the Natural Bridge from DeChastellux’s ‘Travels in 
North America; the photographing to be done in the rooms 
of the society. On motion, the request was granted. 
The death of Prof. George Englemann, at St. Louis, Febru- 
ary 11, aged seventy-five, was announced. 
Dir ee ’ 
Mr. Lesley was appointed to prepare an obituary notice of 
Professor Guyot. 
Professor Cope read a paper entitled, On the structure of the 
skull in the Elasmobranch genus Didymodus. 
Mr. Ashburner presented some notes “On aneroid hyp- 
sometry,” and exhibited a self-registering field instrument. 
Mr. Hotchkiss explained his request regarding pictures of 
the Natural Bridge, and spoke of the fine photographs recently 
made of it by order of Mr. Kemble, 883 Walnut street, Phila- 
delphia. 
Pending nominations, Nos. 1012, 1018, and new nominations, 
Nos. 1014, 1015, were read. 
