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Patent Model for Triangular Drafting Scale Invented by Josiah Lyman
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Patent Model for Triangular Drafting Scale Invented by Josiah Lyman

Lyman, Josiah · 1863 · german silver (overall material)

From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.

About this work

Both edges of one side of this German silver triangular rule have scales divided to 1/40" and numbered by twos from 3 [<i>sic</i>] to 24 and by ones from 1 to 6. This side is marked: In. 40. U.S. STD. It is also marked: Josiah Lyman, Lenox, Mass.

National Museum of American History’s own description
Subjects
Patentsscale rule, triangularrule, triangularModelsMedicine and Science: Mathematics
Credit linePatent Model for Triangular Drafting Scale Invented by Josiah Lyman. 1863. Lyman, Josiah. National Museum of American History. CC0.
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