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
and on each of the tangentsset off the number of parts corresponding to the number of itsradius, so that No. 12 has twelve divisions set off on it (that is,equal to the circumference of the circle) : a line traced throughthe ends of these lines will be the ctirve required. 36. To describe a… … the circle and meeting the line ab in a, b, 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,…
