NOTES ON LEVELLING WITH THE ANEROID BAROMETER

Abstract

In chapter 5, page 12, of my “Report on a Rapid Geological Survey of the Gambia” (Gold Coast Geological Survey Bulletin, NO. 3) I have stated the opinion of Prof. Julius Hann of Vienna that the barometric curves may be analysed into two components:-

semi-diurnal, constant, depending on latitude and altitude (with a slight yearly alteration);

diurnal, depending chiefly on temperature (and humidity ?).