THE SOLUTION OF ANALYTICAL PROBLEMS. 



245 



Example a. — The analytical figures were : — 



Specific gravity, 

 Total solids, 

 Fat, . 

 Ash, . 

 Solids not fat, 



1-0234 



9-82 per cent. 



3-21 



0-51 „ 



6-61 



From the extreme lowness of all the figures it was concluded 

 that 26 per cent, of added water was present. 

 Example h. — The analytical figures were : — 



Specific gravity. 

 Total solids. 

 Fat, . 

 Ash, . 

 Solids not fat, 



1-0300 

 11-46 per cent. 

 3-33 

 0-68 

 S-13 



In this case it was concluded from the low solids not fat, and 

 the correspondingly low ash, that a small amount (5 per cent.) 

 of added water was present. 



Example c. — Two samples of milk taken from two churns 

 arriving at a station from a farm. 



The analytical figures were : — 



Specific gravity, 



Total solids, 



Fat, . 



Ash, 



Solids not fat. 



No. 1. 



1-0234 



9-19 per cent. 

 2-67 „ 

 0-55 



li-.-,2 



1-0298 

 1 1-6 per cent. 

 3-30 



S-31 „ 



In this case analyses of milk from the same farm had been 

 made for some time previous, and the solids not fat had not 

 been found to fall below 8"6 per cent. It was concluded that 

 No. 1 contained 24 per cent, and No. "2 3 per cent, of added 

 water. The conclusion about No. 2 would not have been justified 

 had there not been evidence of the normal composition of this 

 milk. 



Example d. — The analytical figures were : — 



Specific gravity. 

 Total soGds, 

 Fat, . 

 A.-sli, . 

 Solids not fat, 



1-0291 

 12-78 per cent. 

 4-36 „ 



0-73 

 S-42 „ 



Genuine authenticated samples fi'om the same source had been 

 found to contain as little as 8-28 per cent, of solids not fat. It 

 was, therefore, concluded that this sample was genuine, but 

 Abnormally poor in solids not fat. 



