Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 129
draAVn.^In Fig. 132 and 133, the lines, a d andc? c, are semi^axes, thetangents, a b and b c, being at right angles to each other. Todraw the curve, see Art. 118. In Fig. 137, the curve is para^bolical, and is drawn according to Art. 127. In Fig, 138 and 139,the curve is hyperbolical, being…
Carpentry · Architecture
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