THEORY 01- THE HOU'LIXG TELEI'IIOXE 



47 



\-alues is well within the experimental error inxoKed in deterniining 

 the constants used in the calculation. 



In Fig. 12 are shcnvn similar calculated cur\es for a transmitter 

 called "hollow," that is, for one having a lower natural period of 

 \ibration. It is coupled to the same receiver as used before. The 

 dotted curves in each case represent the behavior for reversed current. 



40 

 LENGTH OF TUBE (CMS) 



Fig. 11 



1100 



1000 



2 900 



i'Soo 



2^ 700 

 &00 



500 



LENGTH or TUBE (CMS) 



Fig. 12 



