Star-land; being talks with young people about the wonders of the heavens (1899)
Ball, Robert Stawell, Sir, 1840- [from old catalog] · Boston and London, Ginn & company · leaf 67
ement,and say that the table here takes more than twenty-fourhours to go round. And now I want some way ofproving that such is actually the case. There is no usein our merely looking at it, because we ourselves, andthis whole building, and the whole of London, are allturning together. What we want… … and graceful motion. I want it to oscillate verysteadily, so I draw it to one side and tie it by a pieceof thread to a support, and then I burn the thread, andthe great ball begins to swing to and fro. It wouldcontinue to do so for an hour, or indeed for several THE PENDULUM AND THE TABLE. 55…
Astronomy
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