Ball, W. W. Rouse (Walter William Rouse), 1850-1925 · London, Macmillan · leaf 372
and Trellis-Bridge. From each of these forms again we can proceed invarious ways. I will describe first the figures produced whenthe string is taken off so as to lead successively from theCradle to Snuffer-Trays, Cats-Eye, and Fish-in-a-Dish. Thisis the normal sequence. The Cradle—see figure i—is… … Figure i. The Cradle. The Cradle is produced thus. First. One of the operators, P, loops thestring over the four fingers of each hand, which are held upright, pahn towardspahn, the near or radial string lying between the thumbs and index-fingers, andthe far or ulnar string beyond the little…
Geometry · Cryptography · Ciphers
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