124 



DAIRY ■ri';(l(N()LO(;Y 



Sediment Test. The cleanliness o{ milk is indicated 

 somewhat by the amount of dirt or sediment it contains. 

 There is no wa}' of extracting all the dirt that may have 

 fallen into llu' milk durint!; or sul)se(|uent to milkin;i;, he- 

 cause nearh' oiu'-lialf of ordinary barn, jlirl is soluble; 

 hence the ])resenee of a small (|uanlit\' of \'isible dirt is 

 usually an indication that a ^^reater quantity is present 



Fic. 2q. - Tlic Wisioiisiii milk srdinu'nl Irstcr. 



in the milk. 'I'he tleanliiu'ss of milk may be roufj;hly 

 ascertained by centrilu,ti;in|^ a saiuple, or by tillering a 

 certain volume through absorbent Kilton and noting the 

 amount of discoloration and liltli depdsit on tln' filter. 

 Tests for this latter purpose are manufactured and offered 

 for sale. 



Babcock and Farrington describe a milk-sedinient test 

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



