16 DAIRY LABORATORY GUIDE 



reverse is true of cream. Repeat tests, using cream, 

 but instead of measuring with pipette, weigh on 

 cream scales prepared for the purpose, using 18 grams 

 on account of the difference in specific gravity (com- 

 parative weight) between milk and cream. A still 

 more accurate test for heavy cream is obtained by 

 using 9 grams of cream with about the same quantity 

 of water and multiplying the result by two (2). 

 The richer the cream the more fat it contains and 

 consequently the lighter it is, and vice versa. 



The variation between measurements and weights 

 of a given amount of cream is as follows: 



Cream testing 15 per cent equals 8 pounds and 7 

 ounces per gallon. 



Cream testing 20 per cent equals 8 pounds and 6 \ 

 ounces per gallon. 



Cream testing 25 per cent equals 8 pounds and 6 

 ounces per gallon. 



Cream testing 30 per cent equals 8 pounds and 5J 

 ounces per gallon. 



Cream testing 35 per cent equals 8 pounds and 3 

 ounces per gallon. 



Cream testing 40 per cent equals 8 pounds and 1 

 ounce per gallon. 



Cream testing 45 per cent equals 7 pounds and 15 

 ounces per gallon. 



Cream testing 50 per cent equals 7 pounds and 14 J 

 ounces per gallon. 



Repeat; using in first experiment less acid; second 

 experiment, cold milk; and third experiment, cold 

 water. Note results. Similarly test butter and 



