Mechanical drawing. Elementary and advanced (1910)
Reid, John S. (John Simpson), 1856- · New York, J. Wiley & sons; [etc, etc.] · leaf 67
three equal partsand make 2, 3 equal to two of these. From centers 1 and 3with a radius somewhat greater than the half of 1, 3, describearcs intersecting at the center of the arc 1, 3, 52 MECHANICAL DRAWING. Ffgb sh. To Describe the Echinus, QuarterRound, or Ovolo.—Draw I, 2 perpendicular to 2,… … Fig 89. Fi°b* 90 To Describe the Apophygee. Divide 3^ 4 into four equal parts and lay off five of these parts from3 to 2. From points 2 and 4 as centers and radius equal to2,3, describe arcs intersecting in the center of the curve.
