Star-land : being talks with young people about the wonders of the heavens (1891)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · London ; Paris : Cassell & Co. · leaf 186
neral truth. Set a humming-top spinning (Fig. 56);it gradually comes to rest, partly because of the rubbing ofits point on the table, and partly because it has to forceits way through the air In fact, the hum of the top thatyou hear is only produced at the expense of its motion.I have here a much… … Fig. 50.—The humming-top. 172 Star-Land. Professor Clerk-Maxwell. He had, when at Cambridge,invented one of these large and heavy tops, which wouldspin for a long time. One evening the top was leftspinning on a plate in his room when his friends tooktheir departure, and no doubt it came to rest in…
Astronomy
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