J.H. Lamberts freye Perspective, oder, Anweisung, jeden perspektivischen Aufriss von freyen Stücken und ohne Grundriss zu verfertigen
Johann Heinrich Lambert's 1774 treatise on perspective, published in Zürich by Orell, Gessner, Füssli and Company and written in German for draughtsmen and students of perspective drawing. The plates are dense geometric diagrams of vanishing points, sightlines and construction lines for building perspective views without a ground plan. A designer could take from them the clean, schematic logic of projection lines that structure a spatial drawing.
