Overview Joseph Mellick Leidy (1823-1891), one of the great American scientists of the 19th century, possessed a vast knowledge of the natural world. Best known as the Father of American vertebrate paleontology, he also pioneered the fields of parasitology and protozoology, and was the preeminent anatomist of his time. He was also an influential teacher of natural history and an expert in areas as diverse as entomology, geology and pathology. The Joseph Leidy Correspondence collection contains...

Scope and Contents Robert Bridges, president of the Academy in 1864 and 1865, was a botanist. He was chairman of the Botanical Committee for 21 years and worked extensively with the Academy's plant collections, for which he prepared indexes. This collection contains three reports which he prepared indexes. This collection contains three reports of committees on papers submitted for publication. One of 24 pages, a paper dealing with meteors, by Jacob Ennis, defends the committee's decision not to publish. The...