Willson, Robert Wheeler, 1853-1922 · Boston, New York Ginn & company · leaf 21
, the foot of its graduated face on thedegree of the protractor which corresponds to the bearing. Marka fine point on the sphere at that degree of the altitude arc corre-sponding to the altitude at the first observation. This point fixesthe direction in which the sun would have been seen from the… … Fig.11 a series of points (Fig. 11), through which may be drawn a con-tinuous line representing the suns path upon that day. It will appear at once that the arcs between the successive pointsare of nearly equal length if tKe times of observation were equi-distant, and otherwise are proportional to…
Astronomy
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