The forces of nature : an address delivered before the Chemical Society of Union College, July 22d, 1863 Barker, George F. (George Frederick), 1835-1910. Chemistry Electricity Hot Temperature Light Albany, N.Y. : J. Munsell, 1863 Union College (Schenectady, N.Y.). Chemical Society. Addresses Text 45 p. nlm:nlmuid-9513376-bk 9513376 http://resource.nlm.nih.gov/9513376 English The National Library of Medicine believes this item to be in the public domain : https://creativecommons.org/publicdomain/mark/1.0/