April 20, 1948
Certificate with text: "Edinburgh University Chemical Society. This is to certify that the committee of members of the Chemical Society of the University of Edinburgh, satisfied that Linus Carl Pauling is in every respect worthy and eligible, hereby confer upon him Life Membership of the Society. In testimony of this, the office bearers undersigned on this 20th day of April 1948."
Presented by the Edinburgh University Chemical Society.
Name: University of Edinburgh Chemical Society