of Philadelphia 
R. A. F. PENROSE, JR., 
PRESIDENT. 
EDWIN G. CONKLIN, 
HENRY SKINNER, 
VICE-PRESIDENTS. 
JAMES A. G. REHN, 
RECORDING SECRETARY. 
J. PERCY MOORE, 
Corresponding Secretary. 
GEORGE VAUX, JR. 
Treasurer. 
^INSTITUTEF 
MDCCCXII 
v INCORPORATED, 
v MDCCCXVII. 
WITMER STONE, 
HENRY A. PILSBRY, 
GEORGE L. HARRISON, JR. 
T. CHALKLEY PALMER, 
Curators. 
SPENCER TROTTER, 
Librarian. 
Logan Square, 
PHILADELPHIA PA 
