The level of knowledge about exploration geophysical methods in Australia prior to the Imperial Geophysical Experimental Survey (IGES), 1928–30. Part 1

was a field assistant in the IGES, then became Chief Geophysicist of the Bureau of Mineral Resources in 1952.He retired as Chief Director (Operations) of the BMR in 1973. 2 These two references refer to the period of the IGES as 1929-1930 or 1931.However, the official report on the survey, (Broughton Edge and Laby, 1931) "includes a full account of the activities and findings of the Survey, from the date of its inception in London in February 1928, until its close in February 1930.It was the production of the report on the survey that occupied 1931.3 Oliver H. Gish and W. J. Rooney, from the Department of Terrestrial Magnetism (DTM) of the Carnegie Institute of Washington (CIW), were primarily conducting global geophysics.4 It is intriguing that when describing actual surveys nowhere in Broughton Edge and Laby (1931) are dates indicated.This would appear to be intentional for some reason.