The book of stars; being a simple explanation of the stars and their uses to boy life, written to conform to the tests of the Boy scouts (1915)
Collins, A. Frederick (Archie Frederick), 1869- · New York, D. Appleton and company · leaf 145
her, and still more wonderful, it 126 THE BOOK OF THE STARS fills all of the great space in which the planets and the stars areplaced. Now when the particles, or atoms of gas are set in motion,or vibration by a flame of any kind, be it a candle or the Sun,little ripples or waves are started in the… … Fig. 137.—Sound Waves in the Air Set up by Bell. and we see the light. The way in which a flame sends outwaves in the ether and is received by the eye, is shown in Fig.138. It takes a ripple, or wave on the water started by the impactof a stone about one-half second to travel one foot. A soundwave,…
Astronomy · Stars
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