Cornell Universirty Library
From Open Clip Art Library Wiki
The Cornell University Library has a large collection of high quality digitized books, magazines and other papers. All those published before prior to 1923 are fair game:
http://images.library.cornell.edu/
http://www.library.cornell.edu/about/digital.html
http://culuna.library.cornell.edu:8082/BrowserInsight/BrowserInsight

