Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 320
ts, the one interlaced withinthe other. The problem is to separate them. No. II.—The Triangle. The wire is here bent into a triangle, or rather successionof triangles, the one within the other, and terminates on theoutside in a ring passing round the next adjacent portion ofthe wire (see Fig. 430).… … Fig. 430. No. III.—The Snake and Ring. The puzzle to which, this name is given consists of aspiral coil of wire securely fastened off at the two ends.Threaded on the wire is a brass ring (see Fig. 431), and theproblem is to disengage the ring from the spiral.
Puzzles
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![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-302-464.webp)
