VARIATION OF ASH. 



299 



Any deficiency of solids not fat below 9-0 per cent, is chiefly 

 due to a deficiency in the milk-sugar. 



Any excess of solids not fat above 9-0 per cent, is chiefly due 

 to an excess of protein. 



The ash may be deduced with very fair accuracy from the 

 protein by the formula A = 0-36 + 0-11 P. 



H. C. Sherman supports this conclusion, but finds that the 

 formula A = 0-38 + O10 P agrees rather better with his results. 



Table LVI. will give the percentage of ash (calculated on 

 the solids not fat) found in milks containing the percentages of 

 solids not fat named. 



TABLE LVI. PERCENTAGE OF ASH IN MILK. 



All the above samples were undoubtedly genuine. 



Abnormal Milk. Samples which differ greatly from the 

 mean percentage of solids not fat show almost invariably a 

 proportion of milk-sugar, protein, or ash varying very markedly 

 from the average. The following analyses (Table LVII.) of 

 abnormal milks will show this : 



