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SUBSOIL BLASTS FIRED KLiaTRICALLV. 



dW^ ^BOTTOM OF PLOV' uU " >,. 



/: RICH ^ SUBSOIL FULL OF, ^ VALUABLE^rH !aPl.ANT;^F00D2^ 



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KLKCTRIC FIRING OF DVXAMITE SIIOWIXG KFI'KCT OX SOIL. 

 ERUPTIOXS SHOWX ARE MOSTLY GAS. 



