Perspectiva mechanica, und eigentliche Beschreibung derer vornehmsten Instrumenten, so von denen berühmtesten Opticis zum perspectivischen Reissen bissher erfunden worden ...
A 1683 German treatise on mechanical perspective by Daniel Hartnack, printed at Lüneburg, explaining the drawing instruments that earlier optical masters had devised for accurate perspective drawing. The plates show grid diagrams, device cutaways and a geometric solid, so a designer can take from them the look of precise technical draughtsmanship and the visual logic of projection lines converging on a vanishing point.
