Image: Grant mechanical calculating machine 1877

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Description: Grant mechanical calculating machine (1877) George B. Grant Co., 94 Beverly St., Boston, MA
Title: Grant mechanical calculating machine 1877
Credit: "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)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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