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 73
68 §1 GEOMETRICAL DRAWING 59 tninor axis, S in length, intersect at right angles to eachother in the center O, so that DO = OB and AO = OC.With (9 as a center, and O C as a radius, describe a circle;with the same center, and O D as a radius, describe anothercircle. Divide both circles into the same…
