Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 105
t0 the limbs of the Hmoon on each side, at the pointiSS where they are cut by the longitu- dinal wire. The micrometer screwis then turned till the wires arebrought together. The number ofturns of the screw needed to accom-plish this will indicate the arc be-tween the wires, or the angulardiameter… … longitudinal wire against the points, or cusps, of the crescent,as shown in Fig. 103. 89. The Real Size of the Moon.—The real diameter ofthe moon is a little over one-fourth of that of the earth, ora little more than two thousand miles. The comparativesizes of the earth and moon are shown in Fig.…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
