Table 92. Ill 



TERRESTRIAL MAGNETISM. 



Secular Change of Declination. 



Changes in the magnetic declination between 1810, the date of the earliest available observa- 

 tions, and 1910, for one or more places in each state and territory. 



* Tables have been compiled from United States Magnetic Tables and Magnetic Charts for 1905, published by 

 the Coast and Geodetic Survey in 190S. 

 SiviiTHSONiAN Tables. 



