Methodische Anleitung für den Unterricht im Zeichnen : zum Gebrauch in Elementarschulen und höheren Bildungsanstalten ; auch zum Gelbstunterricht in den Anfangsgründen des perspektivischen Zeichnens
A German drawing instruction manual by Karl Ludwig Francke and Friedrich Diesterweg, published in Berlin in 1833 for use in elementary schools, higher academies and self-study of beginning perspective drawing. Its numbered plates show step-by-step geometric solids, shadow-cast blocks, sphere and cylinder intersections, and hatching tone swatches in plain black line, which a designer could use as a clear reference for constructing forms and rendering simple cast shadows.
