Variation in Latitude with the Moon's Position

Abstract

IN an earlier communication to NATURE1 brief results were presented on an investigation of small residuals in the latitude of three of the international latitude stations based on observations made in the years 1909, 1910, 1911. It was there pointed out that there appeared to be a lunar diurnal variation in latitude with a range amounting to so much as 0.07, depending upon the hour angle and declination of the moon.