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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 86

An illustration from 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, leaf 86
Let ABC, fig. 74, be the pitch of the roof; make DE equal totne diameter of the pipe ; describe the circle FG ; make FG thesame in diameter as the pipe ; draw the line FG ; set off on theline FG any number of equal parts; from the points draw lines atright angle to FG as 1, 2, &c. FOR… … Set off the line HI, fig. 76, equal in length to DBE in fig. 74 ,sot off on the line HI the same number of equal parts as in theline FG ; from the points draw lines at right angle to HI; set offon each side of HI the same distance as on each side of the lineFG in fig. 75, as 1, 1, 2, 2, &c.; a…

Metal-work · Workshop recipes

Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.

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