1Academy of Natural Sciences of Philadelphia: TJ’s membership certificate, 1 Jan. 1823, 1 January 1823 (Jefferson Papers)
The ACADEMY of Natural Sciences OF PHILADELPHIA HAVE ELECTED Thomas Jefferson a Correspondent of their ASSOCIATION this Twenty Seventh day of January 1818 W m Maclure , President Reuben Haines , Corresponding Zaccheus Collins Secretary Vice Presidents Will m
2Reuben Haines to Thomas Jefferson, 24 February 1818 (Jefferson Papers)
At a meeting of the Academy of Natural Sciences of Philadelphia , held on the 27 th ultimo Thomas Jefferson of Monticello was duly elected a Corresponding member. The object of this institution being the promotion of all the various branches of Natural Science, especially the investigation of the natural productions of the United States , we shall be happy to receive, and communicate any...