Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 337
tions in a andb (Fig. 695), their oblique projections will be situated in the lines a a and b J,but they are also at e and/; consequently the lines e a and fb are the obliqueprojections of the edges a e and b f. All the circles which, in the rectangular elevation (Fig. 695), have been em-ployed in… … MACHINE DESIGN AND MECHANICAL CONSTHUCTIONS. 321 cal, the major axes of all the ellipses in question are perpendicular to the lineA B, and equal to the diameters of the circles of which they are respectively theprojections ; and the minor axes, representing the horizontal diameters, will…
Mechanical drawing
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