Willson, Robert Wheeler, 1853-1922 · Boston, New York Ginn & company · leaf 50
s to or from thebody by the same amount. Turn the telescope north, and the bubble THE DIURKAI. MOTION OF THE STARS 37 should remain in place; if it does not, adjust the north screw. Theinstrument is very easily and quickly adjusted by this method.The upright axis is vertical when the telescope can…
Astronomy
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