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 60
48 ABCD is the plan of a building to be cov-ered by a groined roof. The arch, the springing of whichis AB and CD, is a semicylinder. The arch which has its HIPPED ROOF. 37 Springing in AC and BD, being of the same height but ofwider span, is semi-cylindroid. A cylindfoid is a solid body of the… … Fig 48. curve of the groin is then generated by the penetration ofa cylindroid and cylinder. On AB describe the semicircle which represents the factof the arch, at the ends AB and CO, and divide it into ar.vnumber of equal parts, a, b, c, etc. It is only necessary touse the quadrant, as throughout…
Metal-work
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