112 A Neiv Dairy Industry. 



produced, the use of the steam turbine separator is to 

 be recommended, and the dc Laval has here given 

 universal satisfaction. When all milk has passed 

 through the separator the scales are used to ascertain 

 if the separation has been effected in the prescribed 

 proportions, returning some of the skim milk to the 

 cream if this latter had not come up to one-third of 

 the entire quantity. 



The percentage of fat to be given to the normal 

 milk is three per cent., or one hundred pounds of 

 milk should contain three hundred units of fat ; a 

 richer milk will therefore have to be reduced by the 

 addition of skim milk, or by the retention of a por- 

 tion of the cream ; a milk poor in fat will have to be 

 enriched by the addition of cream, or by the reten- 

 tion of part of the skim milk. As an example : We 

 wish to use 260 pounds of milk testing 4.2 per cent, 

 of fat ; we separate this into 



S("i.(! pels, cream 173.4 pds. skim milk. 



As we wish our normal milk to contain but 3 per 

 cent of fat, we must find out how much of this cream 

 will have to be returned to the skim milk to result in 

 a milk of the desired percentage. 



4.2 : 3 — .SG.fi : x 



3 X 866 

 01 ' = 61.Spds. 



42 



The reverse will be the case where milk is found 

 to be below the required standard of fat percentage. 



