La operazione del compasso geometrico, et militare
La operazione del compasso geometrico, et militare is a 1640 Padua treatise by Galileo Galilei, printed by P. Frambotto, on the geometric and military compass as a surveying and calculating instrument. The four pictures are plain line diagrams of triangles and right angles with lettered points, showing how the compass was used to measure distances and heights, which a designer could borrow for clean technical schematics.
