The sheet-metal worker's guide : a practical handbook for tinsmiths, coppersmiths, zincworkers, etc., comprising numerous geometrical diagrams and working patterns, with descriptive text (1888)
Crane, W. J. E. (W. J. Eden) · London : Lockwood and Son · leaf 54
42 THE SHEET- METAL WORKER's GUIDE. The radhis (plural radii) is a straight line drawn from the centre to any point in the cir- … Fig. 33. cumference ; the diameter is a straight line drawn through the centre and terminating at the cir- cumference at each extremity. A diameter divides a circle into two equal portions, called semicircles. The a7x is a portion only of the cir- cumference of any circle. A chord is any straight…
Sheet-metal work
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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