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 68
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 … ■zzi< Then set off the line ABC, fig. 58, equal in length to the cir-cumference of the cylinder CE ; erect the perpendicular lines AD,BE and CF; set off on each side of BE the same number of equaldistances, as in the semicircle CDE; fcom the points draw linesparallel to BE; make BE equal to BE ;…
Metal-work · Workshop recipes
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
