118 Mr. L. Schwendler on the General Theory 



and 



But as the same kind of instruments are employed in both 

 the stations, we require evidently also the same force in both to 

 produce the signals, no matter what the state of the line may be. 

 Thus we must put* 



F = P", 

 or 



W vy E' i// 

 4 Q 4 Q ' 



E" _ Vg" 



Substituting this value for the proportion of the electromotive 

 force, we get 



and 

 but 

 and 



Q-V§=o, 



Q-¥§,=0; 



dg l~9 +1 +h 



Substituting these values in the above equations and reducing, 

 and further dividing the first equation by V -\-i and the second 

 by I" ' + i } we get at last 



I" 

 and 



+ i&-t»'-v(i+ : |Q-Q. 



+ ^,+y-3y(i +/ 4)=o. 



Put 



iV 

 P ! + -r—ji = L", measured conduction from station II., 



* This supposition in the case of a perfect line is fulfilled by itself, since 

 then the two instruments are not only of the same kind, but absolutely 

 identical. 



