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Title: Brass slide rule in case, by Troughton, 7 1/2 " long, 3/4" w [Go to resource]
Description: Brass slide rule in case, by Troughton, 7 1/2 " long, 3/4" wide with one slide; engraved at ends on one side, "Troughton's London fecit", on other side, "John Booth Brush house 1791". License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: slide rule Temporal: 1791 Source: Science Museum Creator: J & E Troughton Identifier: 1911-194 Go to resource More Like this...
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