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 84
umber of equal distances as in the semicircle; from thepoints draw lines parallel to BE, as i, i, 2, 2, etc. ; makeAD, BE and CF equal to AC and BD (Fig. 75); also,each of the parallel lines bearing the same figures, as i, i,2, 2, 3, 3, etc.; then a line traced through the points willform the… … Fig- 78- «2 TIN, SHEET-IRON AND COPPER-PLATE WORKER. the semicircle CDE; make CF and EH of equal length;with a radius equal to one-half the diameter of the largepipe, describe the arc FH; divide the semicircle into anynumber of equal parts ; from the points draw lines parallelto AC, as I, 2, etc.…
Metal-work
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