Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 82
and 4-C, 10-C (H);in locating the points through which the H projection of thecurve of the upper base of the frustum is to be drawn, it is necessaryto find the points X and Y—the projection of the intersectionof the elements 4-C and 10-C with the plane of the upper base.To locate these points,…
Mechanical drawing
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