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 81
P^- 73- Set off the line iBC (Fig. 74) equal in length to thecircumference of the Pipe; erect the lines AE, BD and … CF at right angles to AC ; set off on each side of BD the_same number of equal distances as in the semicircle BCD PIPES. 59 (Fig. 73), and from the ])oints draw lines parallel to BD,as I I, 2 2, 3 3, etc. Make BD equal to AB (Fig. 73), andEA and CF equal to ED (Fig. 73) ; also, each of the})arallel…
Metal-work
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