Remember - if this symbol 
appears next to an entry - everything in the site is free, full-text.
American Environmental Photographs 1891-1936: Images from the University of Chicago Library.
Breeds of Livestock – from Oklahoma State University – links to various types of livestock at the top and bottom of the page. Contains text and images where available.
e-Nature – online field guides to plants and animals. Contains images as well as text about each species.
Illustrated Glossary of Geologic Terms – Fairly extensive glossary of terms in geology, some with links to color illustrations.
Images from the History of Medicine – from the U.S. National Library of Medicine collection.
IUCN Red List of Threatened Species – updated each year – provides textual data on each species, images, and links to other relevant information on the web.
JSC Digital Image Collection - also referred to as the NASA Image Collection, this contains more than 9000 NASA press release photos spanning the American manned space program, from the Mercury program to the STS-79 Shuttle mission.
National Archive of Geological Photographs – from the British Geological Survey.
Plant Image Gallery – is an ongoing project which currently includes over 600 species of vascular plants.
Lorrie Pellack
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