Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 122
enty thousand feet above the surrounding coun-try. The floor with-in the ring may beeither above or be-low the outside lev-el; some craters aredeep, and some arefilled nearly to thebrim. In a fewcases the surround-ing mountain ring-is entirely absent,and the crater is amere hole in the plain.… … Fig. 37. — A Normal Lunar Crater (Nasmyth). On some portions of the moon these craters stand very thickly;older craters have been encroached upon or more or less completelyobliterated by the newer, so that the whole surface is a chaos ofwhich the counterpart is hardly to be found on the earth, even…
Astronomy · Constellations
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