Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 75
obliquely. Now the sun is so far distant, thatif the observer at E should locate a horizontal plane, which, ofcourse, would be parallel to the large plane C H A, and describeon it a small circle, and then divide this circle in proportion asthe meridians divide the large circle C H A, and should,… … then, the principle of the horizontal Sun-dial, and all that isnecessary to construct one, is, to graduate it proportionally accord-ing to the latitude. This can easily be done by calculation, which,however, would involve more of mathematical skill than we shallsuppose the reader to possess; we…
Astronomy · Meteorology · Geology · Paleontology
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