4418

REPORT

OF THE

NATIONAL ACADEMY OF SCIENCES

A

FOR

THE YEAR 1891.

WASHINGTON:
GOVERNMENT PRINTING OFFICE.

REPORT

OF THE

NATIONAL ACADEMY OF SCIENCES

FOR

THE YEAR 1891.

WASHINGTON:
GOVERNMENT PRINTING OFFICE.

LETTER OF TRANSMITTAL.

NATIONAL ACADEMY OF SCIENCES,

Washington, D. C., January 25, 1892.

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