[17] Restored patent 4,859X, August 24, 1827, National Archives, Washington, D.C.
[18] U.S. pat. 16,889, U.S. Patent Office, Washington, D.C. The numbered specifications that follow may be found in the same place.
[19] Walker, ed., Reports and Awards, group 15, p. 13.
[20] Ibid.
[21] Tools (Boston, 1884), p. 54 [in the Smithsonian Institution Library].
[22] Tools and Supplies (June 1900), no. 85 [in the Smithsonian Institution Library].
[23] Walker, op. cit. (footnote 19), p. 14.
[24] Tools for All Trades (New York, 1896), item 75 [in the Smithsonian Institution Library].
[25] See Baldwin, Robbins & Co.: Illustrated Catalogue (Boston, 1894), pp. 954, 993 [in the Smithsonian Institution Library].
[26] Walker, op. cit. (footnote 19), p. 14.