Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 133
n-tle-shelves. The tangent, i h, is found thus : bisect the line, a b,at c, and b c aX d; from d, draw d e, at right angles to e 6 ; from6j draw b f, parallel to e d ; upon b, with b d for radius, describethe arc, df; divide this arc into 7 equal parts, and set one of theparts from s, the limit of… … Fig. 163.
Carpentry · Architecture
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