42 



Testing Milk and Its Products. 



sometimes enough to condemn a separator will collect 

 in the neck of the bottles. 



FIG. 14. Apparatus for cleaning test bottles. A, apparatus in position; 

 the water flows from the reservoir through the iron pipe b into the in- 

 verted test bottle d through the brass tube c, screwed into the iron pipe. 

 .B shows construction of the rubber support on which the top of the test 

 bottle rests;/, draining sink. 



Boiling hot water will generally clean the grease from 

 glassware for a time, but all test bottles should, in addi- 

 tion, be given an occasional bath in some weak alkali or 

 other grease- dissolving solution. Persons doing consid- 

 erable milk testing will find it of advantage to provide 



