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 195
these large and heavy tops, whichwould spin for a long time. One evening the top wasleft spinning on a plate in his room when his friendstook their departure, and no doubt it came to rest in duetime. Early the next morning, Professor Maxwell,hearing the same friends coming up to his rooms… … Fig. 57.— The Humming-top. THE FIRST LAW OF MOTION. 183 If we spin a top under the receiver of an air pump(Fig. 58), it will keep up its motion for a very muchlonger time after the air has been exhausted than itwould in ordinary circumstances. Such experimentsprove that the motion of a body will…
Astronomy
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