Scope and Contents These holdings do not include all of Jones's correspondence in the field of biology, since he believed that collections, papers and letters about material from a given region should be deposited and preserved in that area. Other letters have been distributed among various individual correspondents, Boston Museum of Natural History, Society of Natural History of Wilmington, Delaware, and the U. S. National Museum. The Academy's collection contains letters from 166 authors who wrote a total of...

Scope and Contents The deed of gift made by Joseph Leidy, I1 in 1923 to the Academy states that the fund was to be known as, "The Joseph Leidy Memorial Fundn. A bronze medal and an honorarium, not to exceed $100 was to be awarded every third year. Conferred "As a Reward for the Best Publication, Exploration, Discovery or Research in the Natural Sciences in such particular branches thereof as may be designated . . .". Later, an additional sum was supplied by members of the Leidy family, especially by Philip...