'OODHUI.l. 



THE SILO 



13 



Plants do not die as readily as animals when chopped and 

 mashed to pieces. The chopped corn in the silo is still alive 

 and continues so for several days during which time it absorbs 

 the oxygen of the air which was entangled with it when it was 

 packed. Carbon dioxide is given off and the heat produced by 



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this chemical action, being kept in by the large mass of closely 

 packed stuff, may rise as high as 150 degrees. The thermom- 

 eter which we put into the pail of silage will not rise as high 

 as that, simply because there is less material both to produce 

 heat and to confine the heat. It will, however, show a con- 

 siderable rise in temperature. This may also be detected by 



