Institutionum opticarum partes quatuor : conscriptæ in usum tironum
Institutionum opticarum partes quatuor is an 1775 optics textbook by Karl Scherffer, printed in Vienna by Johann Thomas von Trattnern for beginning students. Its plates are numbered geometric diagrams of perspective constructions, with lettered points, vanishing lines and figures labelled Fig. 1 to Fig. 42. A designer might take from them the clean, dense linework of eighteenth-century technical drawing, with construction lines layered over simple solids and grids.
