A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop (1904)
Blinn, Leroy J. [from old catalog] · Philadelphia, H. C. Baird & co. · leaf 112
ig- 105 106. be the pitch of the roof; make DE equal to the diameterof the pipe; describe the circle FG (Fig. 106); makeFG the same in diameter as the pipe ; draw the line FG;set off on the line FG any number of equal parts; fromthe points draw lines at right angle to FG, as i, 2, etc. 90 TIN…
Metal-work
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