C. A. Chant — Reception of Electric Waves. 413 



maxima, showing that wires 335 and 580 cms long were in reso- 

 nance with the radiator, i. e., the radiator emitted waves whose 

 half -wave- lengths were 335 and 580 cms , respectively. The lat- 

 ter appears to be the chief one, which fact is indicated in the 

 table by the change in type. The bottom curve in fig. 4 is 

 plotted from the data contained in the lowest line of Table II, 

 ordinates denoting the readings at the end of the wire, abscissae 



Table III. 

 Method of Resonance. 



Distance of j 

 Description of receiver < Length for maximum Arrangement of 



transmitter. from reading. receiving wire, 



transmitter. ' 



Braun, 3 m antenna 



3 meters 



318, 496, 595 



Free wire 



a 4 « 



i i 



335, 580 (850,* 1160) 



a a 



« a a 



a 



190, 313, 502 



Plate on outer end 



a a a 



a 



286, 518 



Double plate on 

 outer end 



a it kc 



" 



187, 300, 520 



Good earth on 

 outer end 



a a a 



« 



206, 280, 513 



Good earth on in- 

 ner end 



k a a 



a 



270, 500 



Cylinder on outer 

 end 



Simple Marconi, 



1 meter 



420, 650 



Free wire 



3 m antenna 









a it a 



« 



355 



Plate on outer end 



it u a 



" 



415, 640 



Braun coh'r in free 

 wire 



a it a 



a 



410, 645 



Iron turnings coh'r 

 in free wire 



a a a 



a 



400, 650 



Silver powder coh'r 

 in free wire 



a u a 



2 meters 



400, 620 



Free wire 



a a a 



a 



360 



Plate at outer end 



u it a 



a 



365 



a a a a 



a a t. 



" 



153, &£2, 533 



" " inner " 



a u t. 



3 " 



310, 550 



IVee wire 



a it a 



a 



348 



Plate at outer end 



a it a 



a 



360 



a a a a 



a a a 



a 



150?, 336, 480 



" " inner " 



Slaby-Arco, 3 m 



1 meter 



638 



Free wire 



antenna. 









* Minimum. These two readings are from the bottom curve in fig. 4. The 

 value 580 is found there also. 



