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A 1615 Florentine book by the mathematician Benedetto Castelli, published by C. Giunti and held by the University of Toronto's Fisher library, written for a learned scholarly readership. Its one picture is a woodcut printer's ornament, an upright arched frame of scrolls and pillars enclosing a stylised fleur-like flower with two putti at the base, a compact decorative device a designer could adapt for a border or emblem.
