THE ANALYSIS OF MILK 41 



horizontal column the specific gravity, and in the ver- 

 tical column the fat or the total solids ; in the space 

 where the columns intersect the figure required is found. 

 If the last figure in the specific gravity is 9, o, or i, or 

 4, 5, or (). use the figure in the column corresponding 



FIG. 26. Using Milk Scale. 



to the nearest o or 5 ; if it is 2 or 7, use the column 

 corresponding to o or 5, but add. an Table XII 0.05, and 

 subtract 0.05 in Table XIII ; if it is 3 or 8, use the 

 column corresponding to 5 or o, and subtract 0.05 in 

 Table XII and add 0.05 in Table XIII. Read directions 

 for use of each Table. 



The calculation may also be made with the milk scale, 

 which consists of a slide rule (Figs. 25, 26) ; on one side 

 is marked total solids (i inch = I per cent.), on the 

 other the fat (1.2 inches = i per cent.), on the slide 



