The geography of the heavens, and class book of astronomy: (1853)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, Dick, Thomas, 1774-1857. [from old catalog] · New York, F. J. Huntington [etc.] · leaf 214
the solar ornatural days vary very considerably at different times of theyear. This variation is owing to two distinct causes, theinclination of the Earths axis to its orbit, and the inequalityof its motion around the Sun. From these two causes it is,that the time shown by a well-regulated clock… … The difference between mean and apparent time, or. in other words, betweenEquinoctial and Ecliptic time, may be further shown by this figure, which re-presents the circles of the sphere. Let it be first premised, that equinoctialtime is clock time ; and that ecliptic time is solar or apparent time.…
Constellations · Stars
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