Prattica del parallelogrammo da disegnare
A 1653 Italian treatise on the pantograph, printed in Bologna by Giacomo Monti, with text by Christoph Scheiner and Giulio Troili for draughtsmen and mapmakers who copied drawings at a set scale. The pictures are plain woodcut initials and small numbered geometric diagrams of squares and diamonds with boxed numerals, which a designer could use as simple grid-based ornament or as a basis for modular layouts.
