ANNUAL REPORT. 
Wasuincton, D. C., February 13, 1865. 
Sm: I have the honor to submit herewith a report of the 
operations of the National Academy of Sciences during the 
past year, in conformity with the requirements of the act of 
incorporation, approved March 4, 1863. 
Very respectfully, 
A. D. Bacug, 
President National Academy of Sciences. 
Hon. Scnurier Courax, Speaker of the House of Representatives. 
Nationat AcapEemYy or SCIENCEs, 
ashington, D. C., February 11, 1865. 
Sm: In accordance with the provisions of the Constitution 
of the National Academy of Sciences, (Article V., Section 6,) 
following report of the proceedings and labors of the 
Asaiemy during the year 1864 is respectfully submitted to 
Congress : 
Since the presentation of the first annual report, (March 
28, 1864,) thiee Committees have been appointed by the 
President of the Academy, to examine into and report upon 
Subjects submitted to the Academy by different departments 
of the government of the United States. 
On the 5th of January, 1864, a letter was received from 
