202 



MILK 



Several methods which permit the quantity of dirt to be meas- 

 ured with some degree of accuracy have been introduced. Renk's 



tiEffBFRi IMPROVED TtSTEH TESTER WITH 



^^D1MFNT WITH COVER AI*D 



TESTER, STEAM JACKET Rt(BBER, (iUL& 



Fig. 74. — Milk sediment test. (Circular of Information No. 41, Univ. of Wis. 



Agri. Exp. Sta.) 



method is this: Allow the dirt of 1 liter of milk to settle, decant 

 the milk; wash the sediment by decantation, and collect it on a 



Fig. 75.— Sediment in 1 pint of market milk. (Circular of Information No. 

 41, Univ. of Wis. Agri. Exp. Sta.) 



filter. Then wash the residue on the filter with alcohol and ether, 

 desiccate, and weigh. 



The method of Renk was modified by Stutzer in the follow- 

 ing manner: A liter of milk is filled in a bottle which is connected 



