Twelve items consisting of signatures, brief ALSs and TLSs, on various size slips, cards, and government postcards, each signed by a different scientific notable. Signers are: Jonas Salk, S. M. Babcock, Harry Steenbock, Robert Gault, Arthur Compton, Julius Nieuwland, George Sperti, Jesse Dumond, H. S. Booth, Aven Nelson, Charles Crowley, and Frederick Allen. In very good condition, with various scattered toning, folds and trimmed edges to letters, and mounting remnants to many of the corners. RRAuction COA.
