CLARIFICATION OF MILK. 



183 



The same holds true when these determinations are followed over 

 several successive days. Possibly the differences are so small that they 

 do not become sufficiently evident against the fluctuations in the amount 

 of slime eliminated. 



Table X. — Determination of Total Solids in Slime over Successive Days 



Leucocytes (so-called) in Slime. 



That the clarifier throws out of the milk a large proportion of the so- 

 called leucocytes is the testimony from various sources. The number 

 eliminated, moreover, is usually determined by the examination of milk 

 before and after clarification. It is desirable, therefore, to treat this 

 particular subject more fuUy in connection with other corpuscular ele- 

 ments under the discussion of milk. Determinations, however, which 

 have been made from slime directly are quite limited because of the great 

 possibility of error and the difficulties involved, but are helpful in arriving 

 at a knowledge of the clarifier situation. Hammer ^ has estimated as 

 many as 830,000,000 to 1,120,000,000 per cubic centimeter of moist slime. 



The estimates of this laboratory are ba^ed on certified and market milk 

 and upon individual cow's nulk. The authors do not deem this method as 

 accurate as the determination of leucocytes in milk before and after 

 clarification. This attempt at determination does indicate forcibly that 

 the cellular elements of milk make up a no mean portion of the total slime 

 eliminated. 



1 Hammer, B, W.: Agricultural Experiment Station, Iowa State College of Agriculture and 

 Mechanic Arts. Research Bulletin No. 28, January, 1916. 



