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Published online by Cambridge University Press: 15 September 2014
1. In a previous communication (Robb and Tannahill, 1935) the lunar atmospheric pressure inequalities at Glasgow for days whose range of pressure was less than or equal to o·1 in. of mercury were investigated. It was found that a large first harmonic was present and that the second harmonic or semi-diurnal component had a phase angle of 285° in contradiction to the phase angle of 90° as predicted by tidal theory.