The naval architect's and shipbuilder's pocket-book of formulae, rules, and tables and marine engineer's and surveyor's handy book of reference (1884)
Mackrow, Clement · London, C. Lockwood and co. · leaf 27
18 GEOMETRY. spectively corresponding to them, will be points in the requiredcurve. 31. To construct an harmonic curve. (Fig. 42.) Fig. 42. … A LB C Let AC be the base, CK the greaTest ordinate, and bd a balanceordinate midway between AC (the length of this ordinate variesaccording to the degree of fineness required in the curve, but itshould not be greater than |, nor less than |, of CK); then throughD parallel to AC draw de, cutting CK…