Constructive drawing. A text-book for home instruction, high schools, manual training schools, technical schools and universities (1904)
Hanstein, Herman. [from old catalog] · Chicago, New York [etc.] Keuffel & Esser co. · leaf 64
shift the set square to the left.The pencil point will describe the required parabola on thedrawing paper. 126.—Fig. 6.—Problem.—To construct a Oothic arch by para-bolas.Solution.—Let A B be the span and F E the altitude of thearch. Construct the rectangle C D B A, divide C D into 8 andE F into 4… … Fig. 2.
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
