Practical draughtsmen's work, with numerous engravings and diagrams (1903)
Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 79
ig. 132), 9 in. long by 6 in.wide, which would be described by a mathematician as an ellipsewhose transverse and conjugate diameters are respectively 9 in.and 6 in. First draw two centre lines at right angles to eachother and rather longer than the above dimensions, then measure 76 PBAGTIGAL… … Fig. 131.—Another Approximate Method of Drawing an Ellipse. prepare a slip of writing or drawing paper (Fig. 133) with oneedge quite smooth and even ; make a mark on this edge nearone end, and sketch a hand pointing against the mark. Then
Mechanical drawing
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