SOME' PREDICTIONS 21 



ment substitute a half-tone enamel print on copper 

 showing alternate bare and covered parts, and 

 the point then is to find a sufficiently sensitive 

 transmitter." 



The receiver is the part that remained to be made 

 sufficiently sensitive, and I cannot help thinking the 

 word " transmitter " was used for " receiver " by 

 a slip. How this sensitiveness has been obtained 

 will be explained in the chapter dealing with the 

 telectrograph. 



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