Olmsted, Denison, 1791-1859. [from old catalog] · New York, R. B. Collins · leaf 21
TH. of these, the learner should conceive of the earth as ahuge globe occupying a small portion of space, and en-circled on all sides with the starry sphere. He shouldfree his mind from its habitual proneness to consider onepart of space as naturally up and another down, andview himself as subject… … dwell on this point until it appears to him as truly up inthe direction of BB, CC, DD, (Fig. 3,) when he is atB, C, and D, respectively, as in the direction AA, whenhe is at A. DOCTRINE OF THE SPHERE. 9. The definitions of the different lines, points, andcircles, which are used in astronomy, and…
Astronomy
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