Gli artificiosi e curiosi moti spiritali de Herone
Gli artificiosi e curiosi moti spiritali de Herone is a 1647 Italian treatise on pneumatics and automata, a Bologna edition printed by Carlo Zenero that reissues Hero of Alexandria's work with Giambattista Aleotti's commentary. The pictures are rough woodcut diagrams of vessels, siphons, pipes and valves, labelled with letters and drawn in plain outline with hatching for shading. A designer could take from them the clean, schematic labelling of mechanical diagrams and the way fine lines convey pressure and flow.
