Scope and Contents Philadelphia diatomist, elected to the Academy of Natural Sciences, February, 1892, and active in the Leidy Microscopical Society. Scrapbook contains orders and letters pertaining to his book: The Diatomaceae of Philadelphia and vicinity, as well as letters of condolence addressed to Mrs. Boyer. Many items (47) were laid in and are filed separately.Gift of Mrs. Boyer in 1928, preserved by the Leidy Microscopical Society, later stored in the Limnology Department and archived in...

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...