NATIONAL ACADEMY OF SCIENCES, UNITED STATES OF AMERICA. A FACSIMILE OF THE ORIGINAL SIGNATURE BOOK. [Cover title]. [Washington, D.C., 1952]. First edition. Printed letter by the president of the Academy, explaining the history of the signature book, laid-in Original printed wraps. Approx. 11 x 9”. [7] pages of facsimiles. Very good. Silas Weir Mitchell is one of the signers.