RESEARCHES OF THE DEPARTMENT OF TERRESTRIAL MAGNETISM 



VOLUME IV 



LAND MAGNETIC OBSERVATIONS 



1914-1920 



BY 

 L. A. Bauer, J. A. Fleming, H. W. Fisk, and W. J. Peters 



AND 



SPECIAL REPORTS 



J. A. Fleming: Construction of Non-Magnetic Experiment Building 



of the Department of Terrestrial Magnetism 

 H. W. Fisk : Dip-Needle Errors Arising from Minute Pivot-Defects 

 S. J. Barnett: A Sine Galvanometer for Determining in Absolute 



Measure the Horizontal Intensity of the Earth's Magnetic Field 

 J. A. Fleming: Result of Comparisons of Magnetic Standards, 



1915-1921 



Washington, D. C. 



Published by the Carnegie Institution of Washington 



1921 



