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Drawing, Fencing, Cycling, Spaceships and Knitting. And Venice.
1727 Engraved plate from Jacob Leupold’s Theatrum arithmetico geometricum (1727), which illustrates an unusual template, probably made of pearwood, as an aid to drawing the outline of complex curves found in domes, and onion-shaped roofs etc. Drawing Instruments 1580-1980, Hambly M, 1988



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