A practical course in mechanical drawing for individual study and shop classes, trade and high schools
A self-teaching manual of mechanical drawing by William Franklin Willard, published in Chicago by Popular Mechanics Company in 1912 for shop classes, trade schools, and high school students. The line plates show orthographic projections, cone and cylinder developments, ellipses and tangent constructions in fine ruled ink with dashed construction lines, dimension figures, and numbered points on toned paper.
