576 



Tables 726 and 727 (charts) 

 TERRESTRIAL MAGNETISM 



TABLE 726. — World Isogonic Lines, Epoch 1930 (Lines of Equal Declination (D)) 



TABLE 727. — World Isoclinic Lines, Epoch 1930 (Lines of Equal Inclination (/)). 

 Solid Lines Indicate North End Dipping; Broken, South End Dipping 



Smithsonian Tables 



