Tables 746 and 747 

 TABLE 746.— Agonic Line, United States 



595 



The line of no declination (agonic line) is moving westward in the northern part of the 

 country, but south of latitude 30 it is nearly stationary. 



TABLE 747.— Mean Magnetic Character of Each Month in the Years 1906 to 1930* 



Means derived from daily magnetic characters based upon the following scale; o, no 

 disturbance; 1, moderate disturbance, and 2, large disturbance. 



* Compiled from annual reviews of the "Caractere magnetique de chaque jour." prepared by the Royal 

 Meteorological Institute of the Netherlands for the International Commission for Terrestrial Magnetism. 



Smithsonian Tables 



