Olmsted, Denison, 1791-1859. [from old catalog] · New York, R. B. Collins · leaf 65
common year begins on a certain day of the week,how will it end ? How is it with leap year ? How does anyday of the month compare in the preceding and following yeaiwith respect to the day of the week 1 How is this in leapyear ? 84. How did the most ancient nations acquire their knowl-edge of the… … resents the concave surface of the sphere, A, B, twopoints on it, as two stars, and CA, CB, straight linesdrawn from the spectator to those points, then the angu-lar distance between them is measured by the arc AB,or the angle ACB. But this angle may be measured ona much smaller circle, having the…
Astronomy
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