50 MILK-.VNA LYSIS. 



fed milk instead of for country-fed milk, as in tlie taLle, 

 is simple, viz., substitute 10 u for -]j%~ a ; substitute 0.4 a 

 for ft a. 



The occurrence of minus-quantities in the column headed 

 " Eat Eemoved " requires a word of explanation. These 

 minus-quantities have a real and substantial meaning. Tliey 

 are the quantities of fat which have been the reverse of 

 removed, — that is to say, which have been added to the 

 milk. AVhenever one of these minus-quantities occurs in 

 the " Fat Removed " column, one of three things has hap- 

 pened : — ^Either the minus'quantity is within the limits of 

 experimental error, as is the case with throe of them (viz., 

 -0.06, -6.05, and -0.07), or the milk was tovm milk, or the 

 milk had through imperfect mi.^iug received an undue share 

 of the cream. There are only four cases of the kind in the 

 table, viz., -0.57, -0.28, -0.47, and -0.34. 



