THIRD 
ANNUAL REPORT 
OF THE 
BOARD OF TRUSTEES OF THE BUILDING-FUND 
OF THE 
Academy of Natural Sciences of Philadelphia 
TO THE 
CONTRIBUTORS TO THE FUND. 
JANUARY, 1S7G. 
PHILADELPHIA: 
MERRIHEW A SON, PRINTERS, 
No. 243 Arch Street. 
1870. 
