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 28
, c, d, and e; takethe length from D to 5, and set it off on the same line on eachside from e, as eT>: set off the length d4 from d, as r/E. Proceedthus with all the lines, and trace the curve through the pointsso obtained. 37. To describe a conchoid, the asymptote, pole, and diameterheinr/… … through the points 1, 2, 3, kc. ; then from each of these pointswith radius CD describe arcs cutting these lines in a, b, c, &;c. :the points of intersection will be points in the curve. Thecurve above the asymptote is called the superior conchoid, andthe curve obtained by setting off the same…
