Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 98
point i\then a i will be the true plan of the line. In the same way ahrepresents the elevation of the line when lying on the horizontalplane, but making the required angle with the vertical. Nowfrom the centre a with a radius a h describe the arc h k, cutting PBOJEGTION. 95 cein point k, then a k… … Fig. 155.—Piojection ol: Line. upon which it is to be constructed is to assume a sphere whoseaxis is X y, to the surface of wliich the required plane shall betangent. Draw a line at right angles to x Y, cutting it in anypoint a. From point a as a centre with any radius describe thecircle bed to…
Mechanical drawing
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