194 



CLEAN MILK 



bottle is nearly horizontal when whirled, the fat approaches nearest 

 the centre of the whirling body. Hot water is added and the bottle 



Fig- 55- 



Eight-bottle Babcock machine. 



whirled again and the percentage of fat is read off in the neck of 



the bottle. 



Fig. 56. 



Power Babcock machine. 



iThe Babcock centrifugal machines are obtainable in sizes rang- 

 ing from those holding two bottles (Fig. 54) to those holding 24 

 (Figs. 55 and 56), and the smaller are run by hand while the larger 



