I2 4 



DAIRY TECHNOLOGY 



Sediment Test. The cleanliness of milk is indicated 

 somewhat by the amount of dirt or sediment it contains. 

 There is no way of extracting all the dirt that may have 

 fallen into the milk during or subsequent to milking, be- 

 cause nearly one-half of ordinary barn dirt is soluble; 

 hence the presence of a small quantity of visible dirt is 

 usually an indication that a greater quantity is present 



FIG. 29. The Wisconsin milk sediment tester. 



in the milk. The cleanliness of milk may be roughly 

 ascertained by centrifuging a sample, or by filtering a 

 certain volume through absorbent cotton and noting the 

 amount of discoloration and filth deposit on the filter. 

 Tests for this latter purpose are manufactured and offered 

 for sale. 



Babcock and Farrington describe a milk-sediment test 

 devised by them in which one pint of milk is placed in a 



