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Start Over Repository Academy of Natural Sciences, Philadelphia Organization Academy of Natural Sciences of Philadelphia. Organization E.I. du Pont de Nemours & Company. Form Clippings

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Crawford H. Greenewalt papers, 1951-1993 (inclusive)

Extent:
23.6 linear feet (40 containers)
Abstract:
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...(see more)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]

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Academy of Natural Sciences, Philadelphia Division of Environmental Research records, 1952-1995 (inclusive)

Extent:
21.0 linear feet (22 containers)
Abstract:
The Division of Environmental Research (DER) was established as a department of the Academy of Natural Sciences in 1947 by botanist and limnologist, Dr. Ruth Patrick. Originally called the Department of Limnology, the department was envisioned by Patrick as a multidisciplinary team of scientists devoted to helping protect the quality of the environment. Not only was environmental research a novel idea for the time, but the multidisciplinary nature of the research was also innovative. The primary goals of the Division were to, "understand aquatic and terrestrial ecosystems, including the effects of natural processes and human activities; apply this knowledge to assess ecosystems health and developing watershed-level strategies for enhancing environmental quality; and work with diverse stakeholders, including government, community groups, industry and environmental organizations to improve environmental stewardship" (ansp.org). This collection provides evidence of the activities of...(see more)

Held at: Academy of Natural Sciences, Philadelphia [Contact Us]