Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 76
corner a square is drawn and a circleinscribed ; the diagonals of the square are then drawn, and wherethey cut the circle other lines parallel wdth the sides are draw^n.Parallel with two of the sides a line is drawn to represent thetransparent plane or surface which is to receive the picture,… … Fig. 128.—Simple Way to Draw a True Ellipse. the spectators eye directly over the point of sight in the plan.Lines or rays are then drawn from certain of the points on theboundary of the square to the points of sight, and where the eleva-tion rays cut the transparent plane, horizontal lines are…
Mechanical drawing
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