Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 68
pher, Iought most certainly rather to hide than to discover. Iam sure we can dispense with the application of anyphilosophy which would stifle such emotion as Eumfordhere avowed. We cannot devote two hours and a half to a singleexperiment; but I hope to be able to show you sub-stantially the same… … means of which it can be caused to rotate very rapidly.Two pieces of oak, with two semicircular grooves, areso united by a hinge as to form a kind of tongs, t,the gentle squeezing of which produces friction when thetube rotates. I partially fill the tube with cold water,stop it with a cork to…
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