406 THE THEORY OF TERRESTRIAL MAGNETISM. 



When m = 5, F/ = (l-^f, F/ - ( 1 - M ')* (/*), 



When m = 6, F/ = (l - ^)', F r 6 = (1 - p.J (/,), 



19^ 323 

 When m = 7, F/ = ( 1 - /i 2 )*, 



When TO = 8, F 8 8 = (l-^) 4 , F, = (l -/*')' (fi), 



When m=9, F, = (l -/*')*, ^ = (1 -/')* 0). 



When TO = 10, F: = (l-/x7. 



