Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 188
in tins place I have repeated this experiment, sacrificingin each case a fine glass tube 6 feet long and 2 inches indiameter. Seizing the tube at its centre c, fig. 86, Iswept my hand vigorously to and fro along c d, untilFig. 86. finally the half most ^^^ g^^ distant from my handwas shivered into…
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