

? 



THIRD BULLETIN 



OF TB> 



PROCEEDINGS 



OF THE 



NATIONAL INSTITUTE 



FOR THE 



PROMOTION OF SCIENCE, 



WASHINGTON, D. C, 



February, 1849, to February, 1815; 



ALSO, 



PROCEEDINGS 



OF 



THE MEETING OF APRIL, 1844. 







y 



WASHINGTON: 



PRINTED BV WILLIAM a. FORCK 

 PBNN. AVENUE, CORNER IOtH BTRKET. 



1845. 



