DATA FOR MILK INSPECTION. 



VARIATIONS IN COMPOSITION. 



Average proportion of Solids in Milk The most 



extensive data on this point are those obtained 

 by Vieth, a summary of whose results, covering 

 a period of eleven years, was published in The Analyst 

 of May, 1892. The total number of samples was 

 120,540, and although some changes had been made in 

 the methods of analysis since the beginning of the 

 work, the results were recalculated so as to be strictly 

 comparable. The averages of the entire series were as 

 follows : 



Fat . . . 4.1 per cent. 



Non-fatty solids . 8.8 " 



Total solids . . . 1 2.9 " 

 Soxhlet states that normal cows' milk will contain 

 at least 



Total solids . . 12.00 per cent. 



Non-fatty solids . . 8.50 



Fat ... . 3.50 



Seasonal variations in the composition of milk. — 

 The diagrammatic synopsis of the results obtained 

 by Vieth, given on pages 48-49, being a reproduction 

 of the table prepared by him, shows that a notable 



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