Abstract
From an analysis of the Brisbane h'Es data for 1953, Thomas and Svensons? have deduced the existence of a lunar semi-diurnal tide, with amplitude 0 �69 km, and epoch of maximum at 6� 7hr local time. The present author has made a. similar analysis of the Brisbane h'E2s data for the two years, 1952-1953, using nearly 3000 hourly readings.

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