CHAPTEE VIII. 



CALCULATION AND STATEMENT OP BEST7LTS. 



Throughottt the foregoing chapters, the mode of state- 

 ment recommended has been to reckon the milk by measure 

 in cubic centimetres, and the products — the milk-solids or 

 fat, &c. — in grammes. This form of statement -will bo found 

 to be the most convenient, involving, as it does, the least 

 possible calculation. 



Occasionally, however, as in the case of sour milk, we are 

 compelled to weigh the milk instead of measuring it. 



In such a case, a simple calculation will reduce the per- 

 centage statement into a statement in the prescribed form, 

 i. e., of how many grammes are yielded by 100 o. c. of milk. 

 If the specific gravity of the sample of milk be known, the 

 reduction consists in simply multiplying by the specific grav- 

 ity ; if the specific gravity be unknown, the milk should be 

 assumed to be of average specific gravity, viz., 1.029, and 

 the calculation made accordingly. 



In milk-analysis there are two kinds of statement in use, 

 viz , percentage statement — how much of any constituent of 

 milk is contained by 100 parts of milk ; and the other kind 

 of statement, how many grammes of any constituent are 

 contained by 100 cubic centimetres of milk. Inasmuch as 

 100 c. c. of average milk weighs 102.9 grammes, this second 

 statement approximates to a statement of parts per 102.9 

 parts. 

 In the next chapter, which is a reprint from the Chemical 



