Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 119
hanges.Therefore the latitude of any fixed point on the surface ofthe earth undergoes continual variation. The fact wasdiscovered by very accurate determinations of latitude, andfor this reason is known as the variation of latitude. 90 AN INTRODUCTION TO ASTRONOMY [ch. hi, 46 The pole wanders from… … , Fig. 30. — The position of the pole from 1906 to 1913. for the failure to discover it until the work of Chandler andKiistner about 1885. In 1891 Chandler took up the problem of finding fromthe observations how the pole actually moves. The varia-tion in its position is very complicated, Fig. 30…
Astronomy
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