Heiland, C. A. (Carl August), 1899-Pawley, Myron G.Hawkins, J. E.2023-03-222023-03-221940https://hdl.handle.net/11124/16928Includes bibliographical references (pages 41-42).doctoral dissertationsengCopyright of the original work is retained by the author.Ratiometer (Electric meter)GeomagnetismElectromagnetic measurementsDesign of a dual coil ratiometer suitable for geophysical investigations, TheText