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the speech-currents into sound waves, and a horn to distribute the 

 sound. The receiver is so designed that it will carry several watts 



Fig 11. 



with small distortion. It is shown in Fig. 11 where it will be seen 

 that a light spring-supported iron armature is mounted between the 

 poles of a permanent magnet and passes through the center ot the 



Fig. 12. 



coils carrying the voice currents. A light connecting link ties one 

 end of this armature to the diaphragm which is of impregnated cloth, 

 corrugated to permit vibrations of large amplitude. A stamped metal 



