Willson, Robert Wheeler, 1853-1922 · Boston, New York Ginn & company · leaf 76
ing the equatorinto spaces of 6™ each. A strip of parchment orparchment paper about 8 incheslong and -^ inch wide, of theshape shown in Fig. 58, andgraduated to degrees, completesthe apparatus necessary forplotting. The hole being (°^placed over the axis of theglobe, the graduated edge of the strip… … Fig.38 64 LABORATORY ASTRONOMY of the sphere; the graduated edge gives at once the proper declina-tion for plotting the star upon its hour-circle, and the point may bemarked with a -well-sharpened, hard lead pencil; the latter shouldbe carefully kept, and used for purposes of plotting only.…
Astronomy
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The moonstone [electronic resource]: a romance (1886)](https://img.insideoutlibrary.com/img/200/ia-156979296.1876.emory.edu-2-1.webp)
