670 



Professor J. A. Flembvi 



[June 4, 



will be produced oscillations having a certain mean- square value 

 measurable by appropriate instruments. If any receiving circuit is 

 gradually brought by adjustment of its capacity and inductance into 

 exact syntony or tune with the sending station, then this receiver cur- 

 rent reaches its maximum value and there is a definite lesser value of 

 the receiver current for every particular degree of want of tuning or 

 dissonance between the two. The curve which by its ordinates ex- 



Fig. 13. 



-Bellini and Tosi's Kadiogoniometees for 

 Radiotelegraphy. 



Directive 



presses this receiver current corresponding to each particular tuning or 

 natural frequency of the receiving circuit, is called a resonance curve 

 (see Fig. 14). If this curve has a very sharp peak, then it clearly 

 indicates that a slight want of tuning or syntony between the stations 

 will greatly reduce the receiver current. The peakiness of the curve 

 depends upon the sum of the decrements of the sending and re- 

 By the term decrement of a circuit is meant the 



