LETTER OF TRANSMITTAL. NATIONAL ACADEMY OF SCIENCES, Washington, D. C., January 3, 1889. SIR: In conformity with the requirements of the act of incorporation, approved March 3, 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, O. C. MARSH, President of the National Academy of Sciences. The PRESIDENT OF THE SENATE. 3 |