A practical workshop companion for tin, sheet iron and copper plate workers : containing rules for describing various kinds of patterns used by tin, sheet iron and copper plate workers : practical geometry, mensuration of surfaces and solids, tables of the weights of metals, lead pipe, etc., tables of areas and circumferences of circles : japans, varnishes, lackers, cements, compositions, etc., etc., etc. (1876)
Blinn, Leroy J · Philadelphia : Henry Carey Baird & Co. · leaf 67
D, BE andCH; set off on each side of BE the same number of equal dis-tances, as in the semicircle ACB; from the points draw lines par-allel to BE ; make BE equal to EB; make AD and CF equal toDA ; also, each of the parallel lines bearing the same figures as11, 22, 33, &c.; then a line traced… … Let AB, fig. 57, equal the angle of the roof of a building; let,IE, FB equal the pipe; draw the line CE; describe the semi--ircle CDE; divide the semicircle into any number of equal parts;from the points draw lines parallel to EB, as 2, 8, 4, &c, FOR DESCRIBING PATTERNS. 59
Metal-work · Workshop recipes
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
