SECT. 4] OTHER ELECTROMAGNETIC RADIATION 475 



currents in the sea. In the lower latitudes, the total magnetic field is pre- 

 dominantly horizontal and eddy currents have little effect. 



References 



Bancs, A. and J. Wesley, 1960. Horizontal electric dipole in a conducting half-space. 



U.S. Office of Technical Services PB 152676. 

 Sommerfeld, A. O., 1909. XTber die Ausbreitung der Urellen in der Drahtlosen Telegraphie. 



A7in. Phys., 28, 665. 



