43° 



Tables 671-672. 



TERRESTRIAL MAGNETISM {continued). 



TABLE 571. — Dip or Inclination. 



This table gives for the epoch January i, igis, the values of the magnetic dip, /, corresponding to the longitudes 

 west of Greenwich in the heading and the north latitudes in the first column. 



TABLE 572. — Secular Change of Dip. 



Values of the magnetic dip for places designated by the north latitudes and longitudes west of Greenwich in the 

 first two columns for January i of the years in the heading. The degrees are given in the third column and the minutes 

 in the suceeding columns. 



Smithsonian Tables. 



