Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 406
once found, youmay even set the coin spinning (by gently blowing upon thering) without destroying its equilibrium. No. XXXV.—The Balanced Sixpence. The first step is to fix the needle, point upwards, in thecork of the wine-bottle. The next, to cut a slit, a quarter ofan inch deep, across the top of… … at an angle of about Fig. 513.30° to the centre of the cork. Nowbring the edge of the coin carefully down upon the point ofthe needle (see Fig. 513), and, if the forks are properlyadjusted, it will remain balanced, and the cork may even bespun round at considerable speed with little fear of…
Puzzles
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