"Georg Brentel was a painter and engraver who published plans for sundials (the paper could be glued to boards to make a dial). Little is known about him other than that he was a pupil of Philipp Apian (the son of the famous mathematician and instrument maker Peter Apian). This expanded version of Brentel’s 1610 publication treats the same basic instruments (sector and proportional compass) but includes many examples of finding volumes, gauging, weights and measures, etc. An unusual printer’s device occupies the final page" (Tomash & Williams).
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