Proportional dividers designed to give a scale reduction of either 1/2 or an expansion of 2 times the original scale depending on the need

Proportional dividers designed to give a scale reduction of either 1/2 or an expansion of 2 times the original scale depending on the need. In: “Geometriae practicae novae et auctae tractatus I[-IV] ...” by Schwenter, Daniel, 1585-1636. Vol. I, page 79. Published posthumously in 1641.

Photo Category: Treasure - Geodesy

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Author: Archival Photograph by Mr. Sean Linehan, NOS, NGS/ NOAA

License: Public Domain Mark 1.0 (Public domain)

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Original	1108 x 1788	436.79 KB

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Added On	17th October 2015
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