C. A. Chant — Reception of Electric Waves. 419 



With the wires 204 ctns long, bent at the middle and placed as in 

 II, the oscillation was the fundamental proper to the wire with 

 node at B. When a wire 306 cms long was bent and placed as 

 in III, the effect was weak and the vibration poorly formed, 

 as shown in the corresponding curve. There is a loop of poten- 

 tial at each free end, and no other pronounced feature. With 

 408 cms of wire doubled and bent as in IV, the vibration was 

 perfectly formed with nodes at B,D, loops at A,C,E. 



Next, a wire 612 cms long, the straight portions being the 

 same as in IY, and the bent portion CD being 204 cms long, 

 was examined, first with a Brann coherer between the ends 

 D,E, and secondly with the ends D,E joined directly. The 

 effect on this closed circuit was small, with no trace of nodes or 

 loops to be found. 



Then a wire 280 cms long, arranged as in I, was explored. 

 Here the wire was much out of resonance. The vibration was 

 the fundamental proper to the wire and very well formed. 



Lastly, the relation between the magnitude of the effect and 

 the distance of the resonating wire from the oscillator was deter- 

 mined. For this the wire was 204 cms long, and the distance 

 d was varied from 50 to 600 cms . In the accompanying curve 

 abscissae give the distance d, the ordinates the corresponding 

 demagnetization of the detector hung on the end of the wire. 

 It will be seen that the curve is hyperbolic in form, and the 

 effect, therefore, varies inversely as the distance. 



University of Toronto, Toronto, Canada. 



Am. Jour. Scl— Fourth Series, Yol. XVIII, No. 108.— December, 1904. 

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