Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 79
part of the outline. Note especially the angle of the center line of the small ellipse and that the slope of the portion of the j large ellipse is the slope of the numeral [see Fig. 40 (b)]. The form of the p is exactly the same as the 6 inverted (see page 59).
Mechanical drawing
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