Winchell, Alexander, 1824-1891 · Chicago, S.C. Griggs and company · leaf 417
ottom is, therefore, about 8,700feet below the general level. This depression of theinterior is a uniform character of the craters or circles,and is especially marked in the smaller ones. The de-pressed bottom, moreover, as Sir John Herschel hasremarked, is not a right plane, but presents a… … vy Fig 56.—Map of the CRATFii Thfophilus and the Sukkouxding Region. From Neisou: Der Mond. THE MOOK. 389 5,000 or 6,000 feet, but generally the central mass ormasses is much less elevated. The surrounding rampartpresents a succession of somewhat concentric, interrupted,terrace-like formations, as…
Nebular hypothesis · Cosmogony
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