File:Grant Mechanical Calculating Machine 1877.jpg
"Scientific American" Vol. XXXVI, No. 19, May 12, 1877 p.294 New York: Munn &Company (Publisher)
"The Cooper Collections" (uploader's private collection)
Digitized by Centpacrr
Author
George B. Grant Co. (Inventor/Manufacturer); Scientific American (Engraving)
Licensing
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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