Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 52
t accurate. For certain reasons, whichwill be given presently, the sun is apparently subject to suchirregularities, that the solar days, or exact interval, from the timethe sun is on the meridian, until his return to it again at thesuccessive revolution, are of unequal lengths. In other words,… … ~* Let A, B, C, D, be the earth, its north pole N, being towardsus, and suppose it revolving in the order of the letters. Let N Dbe the meridian, or north and south line passing through someparticular spot, Greenwich, for example, shown at E, and let thestar S, be upon the meridian, that is, if…
Astronomy · Meteorology · Geology · Paleontology
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