64 



Art. 9.-T. Terada 



X _ h 



- + A^cos(nt— </',.), 



Il xl+lil 



2 9,7') ^ ^ T ~ ' 



where 



h'ö+xö y xô+ni \ 



. . . /'of ^h 2/i,|/^i 1 • 



lil-\-xl\ ho M^ + xl } 



/«S + a^ü '- a?o ^û + a^o 

 ^5 sin (l',= 



2hji^ 



iIq -jr x^ 



)cos,|' 



M + xl 



'- COS <p 



\ 



^JiJh 



- sm (p. 

 lil-\-xl Kl-]rxl 



For the special case ç=0, /.<?. when the oscillation is linear, 



A. 

 A, 



h 



JA 



hl + x 



'in + a^r! t a:n 



hönrXo y Xçi 



/^5 + a^5 J I 



/? Q + X^j 



or 



1+e^ 



ii i+r- \ 



1 + r 



2(1 + «^ 



if we put 

 Hence, 



. + e \ 1 + Ç- 



7ip=l, a'n=ç^ and A,/a:i = «. 

 A, _ AZ,„ _ (l + g>.-2(e+«) 



/I. 



JX, 



•(2) 



.(3) 



•(4) 



.(5) 



(6) 



i+6^-2(e+«) 



This is greater or less than unity according as a>or<l. Since 

 </f^=(/'^=0, there is no difference of phase, neglecting the induction. 

 If Ave take the induction into account, Z-component will probably 

 lag behind A'', though we are at present at a loss to carry out the 

 calculation. 



Again in the special case ^"—^, 'i-^- when the current 

 oscillates ehiptically, with the axes of the ellipse horizontal and 

 vertical respectively, we have 



