. Allen's digest of plows, with attachments, patented in the United States from 1789 to January 1883 ... Plows; Patents. 3. R. GRAY 81 am-Plow. Palent«rt Oct. 20. 1S51. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Allen, James T. (James Titus). [Washington, D. C. , Joseph Bart, Printer

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpatents, bookyear1883