298 



THE CHEMISTRY OF DAIRYING 



point indicated (31*6), then let the line x'x be moved to the 

 right till the pointer F indicates 3 per cent, of fat on the graph 

 OA, as shown by the dotted line F'. The other pointer N, 

 being also affixed to x'x, will be simultaneously moved the 

 same distance to the right, and will occupy the position shown 



x 



30 



4-0 



FIG. 24. 



by the dotted line N' } which, it will be seen, indicates 8*5 per 

 cent, of non-fatty solids. 



This process can be reversed. In fact, if any two of the 

 data are known, the third can be found in the mechanical 

 manner described above. 



The diagram can be still further condensed by drawing the 

 graphs OA and OB parallel to x'x, and adjusting the size of 



