An Annual Perturbation in the Range of Tide

In the following paper the existence is established of an annual perturbation the range of tide. The perturbation became evident during an intensive examination, by a method described in the paper, of the residual semi-diurnal at Liverpool. Direct analysis of hourly heights for an annual perturbation be consistent from year to year, and to exist generally in British Waters, and throughout the word at large. Analysis of high and low waters further confirmed the result. A study of the general distribution of the perturbation vioded a number of interesting results, as also did a study of its relation with local meteorological conditions. The paper concludes with a short discussion on possible causes of an annual perturbation in the range of tide.