NATIONAL INSTITUTE 
FOR THE PROMOTION OF SCIENCE. 
j Founded at Washington, May, 1840. 
£ Incorporated by Congress, July, 1842. 
WASHINGTON; 
Sir: I have the honor to inform you that you have been elected a 
member of the Institute. 
Annexed is a copy of its Constitution and By-laws; and your aid in carrying out 
the objects of the Institute is respectfully solicited. 
Your obedient servant; 
Corresponding Secretary. 
