4 8 



PLANT DISEASE 



milk, one from a healthy, the other from a 

 tuberculous cow. 



In Milk : its Nature and Composition, by 

 C. M. Aikman, on page n, under " Per- 

 centage, Composition of Milk " gives the 

 range of 



In Foods : their Com- 

 position and Ana- 

 lysis, by J. Winter 

 Blyth (fourth edi- 

 tion), page 297. 



A sample of milk 

 drawn from the 

 udder actually in- 

 filtrated with tuber- 

 cular deposit in 100 

 parts by weight. 



This then is a phthisical milk in its most intense 

 form, and one never likely to be found in com- 

 merce, but admixture of such a fluid with genuine 

 milk is possible. 



I shall give further instances of such varia- 

 tion which have come under my own observa- 

 tion, in the chapter on animal diseases. It is 

 of interest, however, to note one remarkable 

 case of variation, namely that of Glycogen. 



In Text Book of Physiology, by Foster, vol. ii. 



