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A mathematical textbook by Christian von Wolff, printed in 1728, likely in German for students of the sciences, with its plates showing geometry and mechanics diagrams. The four pictures are engraved copperplate tables of numbered figures: triangles, circles and polygons, surveying sketches of towers and buildings, and pulley and lever machines. A designer might take from them the clean, schematic line diagrams and the numbered labelling system used as a graphic device.
