Hoffmann, Professor, 1839-1919 · London : Frederick Warne · leaf 397
according to the cards with which you elect to commence. No. XV.—The Floating- Corks. Solution. If the corks be taken singly, the feat is impossible ; but ifthey be gathered into a bundle, and in that position graspedWith both hands, held under water for a moment, so as to getwell wetted, and then… … Fig. 500. No. XVI.—The Obstinate Cork. Solution. On first trying this experiment the cork will be found tobe forced out of, instead of into the bottle, and the morevigorous the blow the quicker will be its return. Thisarises from the fact that the act of blowing drives a certainamount of air round…
Puzzles
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