Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 56
l idea, but the prin-ciple is different. Two wooden balls (see Fig. 47) are here Puzzles Dependent on some Trick or Secret, 35 united by a turned bar, on which they revolve freely. Roundthe bar is an endless chain, too short to be passed over theball at either end. The puzzle is to remove the… … Fig. -18. Through this disc (the lock), are passed four boxwoodkeys, each consisting of a narrow slip of wood uniting twobroad, flat ends (see b in the same figure). When all are in-serted, the effect is as shown in Fig. 49. The puzzle is to
Puzzles
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