104 



PROCEEDINGS OP THE AMERICAN ACADEMY 



Solids not Fat .... 9.30 



Fat 3.20 



Total Solids 12.50 



Water 87.50 



100.00 



9.23 

 3.27 



12.50 



87.50 



100.00 



For comparison I have annexed the figures as given by an actual 

 analysis of a sample of milk which contained 12.5 per cent of total 

 solidso 



In determininj; the amount of added water for the information of 

 the court, we may use any one of several of the determinations given; 

 that is, we may compare the total soUds, when we have the proportion 



12.5 : a :: lOO : x 



a representing the amount of total solids found, and x the amount of 

 pure milk in the sample ; or we may use the proportion 



9.3 : b :: lOO : x 



b represents the amount of solids not fat. A third proportion is 



4.4 : c : : lOO : x 



c representing the percentage of sugar as found. In order to show 

 how nearly the amount of added water as determined by these three 

 methods agree, I will give, in addition to the six samples of adulterated 

 milk already given, a few more samples of milk suspected of being 

 adulterated, and then give the amount of pure milk and the amount of 

 added water in each sam})le as determined by each of tlie above pro- 

 portions. I also include in the table three other samples of milk known 

 to be pure, but which would be condemned by one or more of the above 

 tests. 



