Willson, Robert Wheeler, 1853-1922 · Boston, New York Ginn & company · leaf 135
l time dothe Pleiades rise at Cambridge ? Rectify the globe by raising the northpole to such an angle that the graduation42°.4 on the outside edge of the brass merid-ian coincides with the surface of the hori-zon. Rotate the globe about the polar axisuntil the Pleiades are in the plane of… … Fig. 48. Rising of Pleiades :20i> 12 Camb. Sid. T. * These solutions were obtained with a not very accurate globe nine inches indiameter. Better results may be obtained with a larger globe in good condition. 122 EXAMPLES OF THE USE OF THE GLOBE 123
Astronomy
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