Our knowledge of the lunar‐diurnal variation of the magnetic declination and new results obtained from observations at Mogadiscio

The opinion that the magnetic diurnal variations also depend on the magnetic elements in the place where they have been recorded, has been set forth by Ad. Schmidt; thereafter the question has been treated occasionally, most recently in a paper by A. G. McNish For this question the magnetic observations made during the Polar Year at Mogadiscio are of special interest because the magnetic observatory there lay in the northern geographic but in the southern magnetic hemisphere, in other words, the Observatory lay between the geographic and the magnetic equators.