Smithsonian Report, 1913. — Bauer. 



Plate 5. 



DuPERREY's Chart of the Magnetic Meridians for 1836. 



[If the earth were uniformly magnetized, its magnetic poles would be located diametrically 

 opposite one another. However, because of the complexity of the earth's magnetic condi- 

 tion, the chord connecting the two poles passes through the earth 750 miles distant from the 

 center.] 



