PART I. ON MAGNETIC STORMS. CHAP. II. 



103 



The calculation has been made in three cases, and the result is given in the tables below. 



/< = 6366 km. 

 is employed as the mean radius of the earth. 



The following values, given in the table, correspond to a current-strength of io 6 amperes, and the 

 values of the force are expressed in y. 



TABLE XV 



// = 200 km. ; 2 / = 1600 km. 



= 300 km.; 2 / = 2500 km. 



// = 300 km.; 2 / = 5000 km. 



// = 200 km. ; / = oo 



ifj o 



