September 2, 1931
Certificate with text: "The American Chemical Society. At its annual meeting commemorates by this certificate the 1931 award of the American Chemical Society Prize for meritorious work in pure chemistry by young men to Linus Carl Pauling of the California Institute of Technology in recognition of the important research contributions made by him as summarized under the title: The Structure of Crystals and the Nature of the Chemical Bond and presented at the Annual Meeting of the Society in Buffalo, New York, September 2, 1931."
Awarded by the American Chemical Society.
Name: American Chemical Society