438 



Report S.A.A. Association of Science. 



ATLANTA 

 Scales 



10= lOOO Million gals wakr. 

 lO = 10 Million Ib5 coal. 



1884 



1895 



1903 



LOMDOISl 



1= I Million populahon 

 I =40 (I gals per day 

 I = £. 4-00 ooo 



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