Title-page with title written on a lion's skin hung between two solomonic columns at centre, a man making a geometrical drawing on the floor at left, several men onlooking behind him, two putti holding medals in lower right corner, other putti measuring the diameter of a sun-ray in background; proof before lettering; after abraham van diepenbeeck; title to gregoire de saint-vincent's "problema austriacum plus ultra quadratura circuli" (antwerp: 1647)
engraving. Date: circa 1647. Dimensions: Height: 305 mm (trimmed); Width: 205 mm. Medium: paper. Collection: British Museum. Print, title-page (BM 1891,0414.1043)
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