Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 93
D is a heavy symmetrical metallic disk,mounted on an axis which passes through 0, thecentre of the disk, and is perpendicular to its twosides. This axis terminates in pivots C 0, whichfit into holes made at opposite extremities of thediameter of a circular ring B B\ which is furnishedwith two… … Fig. 36.—The Gyro-scope. ploy? How does the gyroscope prove the Earths rotation? Describe the con- PAEALLELS AND MEEIDIANS. 87 tical circle A A, which is suspended by a fine wire from the fixed point S.At A is a pivot, which rests in a small hole. All the pivots are highlypolished, so that friction…
Astronomy
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