DETERMINATION OF SPECIFIC GRAVITY 

 Table 102. Continued. 



607 



Specific gravity of fat at 15 C., .93. 



Specific gravity of fat-free serum at 15 C. = 1.036. 



F = per cent of fat in any cream. 



100 F = per cent of serum. 



Volume of fat in 100 grams of cream = c.c. 



100-F 



Volume of serum in the same cream = 



1.036 



c.c. 



Volume of 100 grams of cream must equal the sum of the above 



F , 100-F 

 quantities, or -^ +- T5 ^-cc. 



Since volume in cubic centimeters multiplied by the specific 

 gravity equals the weight in grams 



(F 100-F \ 

 "93"+ 1036 ) X s P ecific ^ ravit y of cream =100. 



By reduction the following formula is obtained : 



Q * f 96.348 



Specific gravity of cream 93 195 p 



The values in the Table 102 are theoretical and apply only 

 to cream free from air, in which the specific gravities of fat and 



