ANNUAL REPORT. 
Wasninertor, D. C., March 19, 1866. 
Sm: In conformity with the requirements of the act of 
incorporation, approved March 4, 1863, I have the honor to 
submit herewith a report of the operations of the National 
Academy of Sciences during the past year. 
Very respectfully, 
JosEpH Henry, 
Vice-President National Academy of Sciences. 
Hon. Scnuyter Corax, Speaker of the House of Representatives. 
NatTionaL ACADEMY OF SCIENCES, 
Washington, D. C., March 19, 1866. 
Sm: In accordance with the requirements of the Consti- 
tution of the National Academy of Sciences, (Article V., 
Section 6,) the following report of the proceedings and labors 
of the Academy during the year 1865 is respectfully sub- 
mitted to Congress. 
Since the presentation of the last Annual Report, (Feb- 
Tuary 13, 1865,) no new subjects of investigation have been 
Presented to the Academy by the departments of the gov- 
fmment of the United States, and consequently no new 
Committees have been appointed. 
eee on Weights, Measures, and Coinage, ap- 
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