Brocklesby, John, 1811-1889. [from old catalog] · New York, Sheldon and company · leaf 46
s the direction VlVHHl, is neces- See Appendix. II, How is the period of rotation divided ? What is said respecting the density of theearth? What does Chapter Second treat of? What is the meaning of the termhorizon ? Giye the Boning of the term sensible horizon, and explain from figure. 34 THE… … HORIZON EXPLAINED. the two planes is usually so small that they are generallyregarded as coinciding; the plane of the horizon beingsupposed to pass through S. 37. Rational Horizon. The second or rational hor-izon is a vast imaginary circle whose plane passesthrough the centre of the earth, dividing…
Astronomy
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