Investigations of Gravity and Isostasy

From the INTRODUCTION:For a number of years the United States Coast and Geodetic Survey has been carrying on geodetic investigations of isostasy, with special reference to the effect of the isostatic compensation upon the deflection of the vertical and the intensity of gravity. Four reports on these investigations have appeared, the first one in 1909 and the last in 1912. The first two dealt with the determination of the figure of the earth from deflections of the vertical in the...
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From the INTRODUCTION:For a number of years the United States Coast and Geodetic Survey has been carrying on geodetic investigations of isostasy, with special reference to the effect of the isostatic compensation upon the deflection of the vertical and the intensity of gravity. Four reports on these investigations have appeared, the first one in 1909 and the last in 1912. The first two dealt with the determination of the figure of the earth from deflections of the vertical in the United States, corrected for topography and isostatic compensation. In the last two there were given tho results of the investigation of the effect of topography and isostatic compensation upon the intensity of gravity at stations mostly in the United States. The present volume gives the results of further study of the relation between gravity and isostasy. In it are embodied the gravity data resulting from the previous work. In the second gravity report 124 stations in the United States were considered, while in the investigation of which this volume is a report there are listed 219 gravity stations in the United States, 42 stations in Canada, 73 stations in India, and 40 others, principally in Europe. The Canadian stations were established by F. A. McDiarmid, of the Geodetic Survey of Canada. He reduced those stations for topography and isostatic compensation after the method described in Special Publication No. 10. The late director of the Geodetic Survey of Canada, Dr. W. F. King, generously furnished to the United States Coast and Geodetic Survey the results of their work for incorporation with the United States stations in some phases of this investigation, previous to their publication in Canada....