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 107
as measured by the Sun,at all places alike. 191. Difference of Time and Longitude.—In fact, asthe Earth, whose circumference is divided into 360°, turnsround once in twenty-four hours, the Sun appears to travelone twenty-fourth of 360°, or 15°, in one hour, from east towest. One degree of… … Fig. 46.—The Earth, as seen from the Sun at the Vernal Equinox(Noon at London). erne of four minutes of time, and vice versa,—the moreeasterly longitude having the later time. The difference of longitude between New York and London beingabout 14°, the difference of time is 4 times 74 minutes, or…
Astronomy
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