Geometrical drawing, projection drawing, freehand and ornamental drawing, wash work and brush drawing, elementary perspective drawing, architectural drawing (1921)
International Correspondence Schools · Scranton, PA : International Textbook Co. · leaf 131
f the object to which they pertain. Themore distant the object is placed from the eye, the fartherseparated are the two principal vanishing points. Thevanishing points of all horizontal lines are on a level withthe eye; and the horizontal straight line passing throughthem all is called the horizon.… … u
