Le Operazioni del Compasso Geometrico et Militare
Le Operazioni del Compasso Geometrico et Militare is a 1649 treatise by Galileo Galilei on the geometric and military compass, a calculating instrument for surveyors and artillery officers. Its diagrams are plain line drawings of triangles, sight lines and angle markings with lettered points, showing how distances and heights are measured by proportion; a designer might borrow their clean geometric linework and tidy labelled construction.
