r ,. v j 
m 
* 
% 
s» 
4 
4 
4 
4 
j 
4 
§ 
* 
§ 
* 
* 
$ 
s 
% 
% 
* 
4 
% 
\ 
*> 
t 
% 
% 
% 
% 
% 
l 
*> 
% 
*> 
% 
% 
% 
% 
\ 
% 
% 
*) 
% 
FOURTH BULLETIN 
OF THE 
NATIONAL INSTITUTE 
FOR THE 
PROMOTION OF SCIENCE 
WASHINGTON, D. C„ 
February, 1843, to November, 1840, 
WASHINGTON : 
PRINTED BY WILLIAM Q. FORCE 
TENN. AVENUE, CORNER 1'OtH STREET. 
1846. 
* 
4 
4 
4 
4 
§ 
J 
<s> 
4 
4 
4 
* 
p ■ 
H 
