Crawford H. Greenewalt papers 1951-1993

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Crawford H. Greenewalt papers 1951-1993

http://dla.library.upenn.edu/dla/pacscl/ead.html?id=PACSCL_ANSP_ANSP2010010

Crawford Hallock Greenewalt (1902-1993) was a chemical engineer and the President of the DuPont Company from 1948 to 1962. He had a passion for the natural sciences, and combined his love of ornithology with photography. He was especially known for his high speed photographs of hummingbirds. His ornithological interests included bird songs, the radiance of hummingbird feathers and the evolution of shapes and sizes of birds in relation to their flight abilities. The Crawford H. Greenewalt papers document Greenewalt's personal study of ornithology, primarily his work on hummingbirds. The collection dates from 1951 to 1993 and consists primarily of photographs taken by Greenewalt, and technical data collected by Greenewalt. The images photographed by Greenewalt exist in many different formats throughout the collection, including prints, negatives, and slides. The technical data in this collection represents Greenewalt's research into the physiology of hummingbirds, and the development of his high-speed photographic technique. In addition to Greenewalt's research material, this collection houses drafts and edits of some of Greenewalt's original publications. The collection also includes awards, certificates, honorary degrees and some camera equipment.

23.6 Linear feet; 40 containers

Academy of Natural Sciences of Philadelphia

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SNAC Resource ID: 6327898

Academy of Natural Sciences of Philadelphia

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Academy of Natural Sciences of Philadelphia

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The oldest natural science research institution and museum in the Americas, the Academy of Natural Sciences of Philadelphia was founded in 1812 "for the encouragement and cultivation of the sciences, and the advancement of useful learning." Since the founding of the Academy of Natural Sciences of Philadelphia, there have been twenty-eight presidents and five acting presidents (please see additional note for a complete list of Academy presidents). From 1937 to 1995, there were four pre...

Massachusetts Institute of Technology

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The Department of General Studies at the Massachusetts Institute of Technology (MIT) did not officially exist until 1882. Courses in general studies were offered as early as 1865, when the MIT Catalog offered a curriculum option called the Course in Science and Literature. At that time, all regular MIT students were required to take “general studies” classes from the Course in Science and Literature, in addition to English, history, and modern languages. In 1882 the Course in Scienc...

Greenewalt, Crawford H., 1902-1993

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Crawford H. Greenewalt was an executive with the Du Pont Company and president of the firm from 1948 to 1962. He joined the company in 1922 and served as a supervisor on the nylon project in the 1930s and during the war as technical liason on the Manhattan Project. He was an accomplished amateur photographer and ornithologist and author of a study of hummingbirds (1960). After his retirement from Du Pont, Greenewalt served on a number of corporate boards, business, political, scientific, civic a...

E.I. du Pont de Nemours & Company

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The family firm of E.I. du Pont de Nemours & Company was established in 1802 and during the 19th century it became one of the United States' most important manufacturers of black powder. In 1902 three younger du Pont cousins: T. Coleman, Alfred I., and Pierre S. took over the company and within three years succeeded in bringing 75% of the American explosives industry (which at that time included black powder, dynamite, and smokeless powder) under their control. During the first decade of the...

Visual Resources for Ornithology (Organization)

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