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the current in the first circuit. The absolute value, when the 
resistance is given, depends only on the electromotive force used. 
Therefore it is variable within wide limits. 
From fig. (1) 7, appears to approach asymptotically to zero and 
therefore to get but once zero. The current 7, (= 7,,) rises from zero 
to a maximum value, and then falls continuously to zero again. 
Therefore this current twice gets the value zero. The current 
is (=7,) (comp. fig. 2), first diminishes from zero, reaches a minimum 
value, rises to a maximum value and finally falls also asymptoti- 
cally from the positive side to zero. It gets the zero value three times. 
The current 7, (= 4) first rises in positive sense, reaches a maximum, 
falls through QO to a minimum, rises again to a second maximum 
and finally falls asymptotically from the positive side to zero. Thus 
it has four roots. The current 7,(—7,) cuts the axis one time more 
than 7,, and therefore gets six times zero value. | 
The currents in 6 coupled circuits in a non-closed series can be 
represented by analogous curves, as has been remarked before. 
In the exponents of all terms ePt always the product 7¢ occurs. 
Therefore, in changing the resistance, we can arbitrarily change 
the duration of the successive current-pulses. By increasing the 
number of coupled circuits we can arbitrarily change the number 
of the successive current-pulses. The magnitude of the maxima is 
given by the electromotive force in the first circuit, for fixed 
resistance, self-induction and mutual induction. 
We are obliged to Prof. Dr. L. S. ORNsreiN for his encourage- 
ment and help. 
