Lehrbuch der Perspective

A practical manual teaches the geometric foundations and visual principles needed for drawing accurate perspective, beginning with basic definitions and measurement tools and then explaining viewpoint, horizon, distance, and the rules that govern perspectival appearance. It gives methods to locate directions and foreshortening of horizontal and inclined lines, construct vanishing points when inaccessible, and compute relative sizes at depth. Later sections apply these methods to compressed circles, regular polygons, wheels, cylinders, and various vault and dome forms, offering worked examples and numerous in-text drawings that emphasize constructions and simpler techniques usable for freehand work.