Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 242
e the ellipseABPD, having the sunat the focus $, the ex-tremities A and P of thetransverse axis are call-ed, the former the Aphe-lion, and the latter thePerihelion. The angularvelocity of the planet isthe least at aphelion andgreatest at perihelion. Again, denote the angleCm Q by a, and supposethe… … Fig. 136.
Mechanics · Acoustics · Optics
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