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 187
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… … Fig. 57.—To illustrate the first law of motion. the same friends coming up to his rooms again, jumped outof bed, set the top spinning, and then got back to bed, andpretended to be asleep. He thus astounded his friends, who,of course, imagined that the top must have been spinningall the night long !…
Astronomy
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