Natural Sciences of Philadelphia 
47 
Exchange Service. As this medium of transmission is not in a 
position to forward consignments to Germany and Austria until 
the peace treaties are finally ratified, the last number of the Pro¬ 
ceedings, 1920, part I, was sent by regular mail, as will be the fut¬ 
ure issues until the usual method of transmission is again available. 
Conditions in Russia prevent the sending entirely. 
The following were elected members during the past year: Ast- 
ley P. C. Ashhurst, Edward B. Bartram, W. S. Beach, Charles P. 
Bower, Frank B. Bower, Hamilton Bradshaw, T. Wistar Brown, 
3rd., J. E. B. Buekenham, John Cadwalader, 3rd, Sabin W. Colton, 
Jr., Francis E DuPont, Richard Erskine, Childs Frick, Samuel G. 
Gordon, David E. Harrower, Joseph Hepburn, Joseph S. Lovering, 
W. G. McDaniel, J. Franklin McFadden, Thomas McKean, Frank 
R. Mason, William W. Matos, Hugh Bradshaw Meredith, Lawrence 
J. Morris, Hugh F. Munro, Naomi Pennock, Julian K. Potter, 
Conrad K. Roland, Benjamin Rush, Arthur R. Spencer, D. W. 
Steckbeck, George H. Stewart, 3rd., Henry Carlisle Stewart, 
Henry F. C. Stikeman, J. Fletcher Street, C. E. Tobias, Jr., Harry 
W. Trudell, Rodney H. True, George F. Tyler, Robert F. Welsh, 
William Chatten Wetherill, Edward R. Wood, Jr., Anna Woolman, 
and Edward Woolman. 
Acknowledgment is again due to Dr. J. Percy Moore, and to 
Dr. Philip P. Calvert, who in consequence of my continued illness, 
have kindly acted at the meetings as Recording Secretary, and Re¬ 
corder of the Council, respectively. The other duties of the office 
have been performed by Mr. William J. Fox, who has again com¬ 
piled this report. 
Edward J. Nolan, 
Recording Secretary. 
REPORT OF THE CORRESPONDING SECRETARY. 
During the year the deaths of Sir James A. Grant M. D., and of 
Colonel William C. Gorgas, U. S. A., were announced. The reported 
decease of other correspondents was not verified. The follow¬ 
ing named were elected correspondents: Merrit Lyndon Fernald, 
Hans Frederick Gadow, Johannes Paulus Lotsy, Daniel Trembly 
MacDougal, Raymond Pearl, William Emerson Ritter, William 
Schaus, William Lutley Sclater, and William Berryman Scott. 
The Hayden Memorial Medal for 1920, on the recommendation 
