Abstract

IN NATURE of Jan. 26, 1929, p. 127, Prof. H. T. Stetson has described a variation of latitude with the moon's position, and in the Comptes rendus de l'Academie des Sciences of July 30, 1928, A. Gougenheim has described a variation of latitude with the age of the moon. In October and November 1926 a series of observations of the latitude of Dehra Dun (India, Lat. 30° N.) were made with a prismatic astrolabe, which show a clear relation between the latitude and the age of the moon (Fig. 1), but no relation at all between latitude and moon's altitude (Fig. 2). The variation with the moon's age was about one-third of that found at Algiers, and was apparently in phase with it.

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