THE PYROPHONE. 



447 



(9 1 



la 



N I 



R. 



Fig. 1 Tube witu bi.sGiNG-FLAMES, show- 

 ing Mechanism bt which thk Gas-Jets 

 are made to diverge, and thus give 



RISE TO TEE SotTND. 



Pig. 2. Same, with Flames vnited, when 

 NO Sound is produced. 



