22 



BULLETIN 872, U. S. DEPARTMENT OF AGRICULTURE. 



close to the crocks during the chemical action which forms the gas. 

 This is particularly true when a maximum charge for any container 

 is used. 



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Order of Assembling Chemicals for Final Generation of Gas. 



Having decided upon the number of generators for each floor and 

 the amount of charge for each, the generators should be well dis- 

 tributed. The proper amount of water should then be measured out 



