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Title: Sector with scales of chords and equal parts combined with q [Go to resource]
Description: Sector with scales of chords and equal parts combined with quadrantal protractor or clinometer, brass, English, 18th century License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: sectors
proportion drawing instrumentsTemporal: 1700-1799 Source: Science Museum Identifier: 1990-621 Go to resource More Like this...
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