The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 107
be tangent to the limbs of the HH^H moon on each side, at the pointBnnB where they are cut by the longitu-h9|^ dinal wire. The micrometer screwHb|H is then turned till the wires are^^SH turns of the screw needed to accom-plish this will indicate the arc be-tween tlie 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 · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
