Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 88
hown by the arrow in Fig. 90. The secret liesin the fact that the lid works on a pin hinge, pivoted be-tween the two ends of the box, though the pins do not comethrough, and are not perceptible from the ontsicle. The lidtherefore forms, in fact, a lever, pressure on whose shorterarm raises the… … is movable, being hinged to the bottom of the box, with thestriking surface on its inner side. Open this, as shown inFig. 91, and then press down the edge of the lid, thereby F 66 Ptizztes Old and New. left exposed, and the box will open as depicted in ourillustration. When the striking plate is…
Puzzles
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