Abstract
The present author made a theoretical consideration on the atmospheric tides, taking the vertical current into account. It must be noticed that the calculated amplitudes of the tidal oscillations are so small that they are compared with those of the temperature oscillations, -even M2 tides is 0·022mm in amplitude at the equator. Thus the observed semi-diurnal pressure change can not be explained as the tide, because not only the amplitude is very large but also the phase of the observed is advanced instead of retarded from the sun's culmination. (The author formally explained how it is caused by the diurnal temperature change.)
