Magnetic observations at Dehra Dun, May 28–30, 1919

In response to the co‐operation requested by the Department of Terrestrial Magnetism for special simultaneous magnetic observations during the solar eclipse of May 29, 1919, I have the honor to forward abstracts of the declination, horizontal force, vertical force, and dip observations taken at the Dehra Dun Observatory, India, on the 28th, 29th, and 30th, May, 1919, in accordance with the published program. It will be observed that no unusual changes occurred in the magnetic elements during the observations; I hope, however, that these observations will be of use in the investigation of the effects of the eclipse on the Earth's magnetism. The geographic position of the Observatory is: Latitude, 30° 19′.3:N.; longitude, 78° 03′.3 or 5 h 12 m .2 E.