132 Agrioultukal Experiment Station, Ithaca, N. Y. 



would not be called satisfactory creamiug. That is, we should 



expect, by the use of a deep setting gravity system in ice or with 



any of the forms of centrifugals, to get a skim milk much poorer 



in butter-fat than was this. 



To see if the Berrigan treatment would have any effect when 



the milk was afterwards set in deep cans in ice water, two trials 



were made. In each case, a Cooley can full of milk that had 



been through the Berrigan treatment, and another from the same 



sample of milk not treated, were set in the Ck)oley creamer with 



the water at a temperature of forty to forty-five. The results are 



shown below: 



Table VII. 



It will be iseen that in the two tests made, practically the same 

 results were obtained from the untreated milk and the milk that 

 had gone through the Berrigan machine. In one case the treated 

 milk was diluted, and in the other not diluted. 



CENTRIFUGAL SEPARATION. 



During the time ta which the preceding tests were made, occa- 

 sional milkings were creamed with a centrifugal machine. This 

 was done in part to test the work done by the machine and in 

 part to check the results that were being obtained ia the other 

 methods. The largest number of the teists were made with a hori- 

 zontal De Laval separator. Toward the end of the series of tessts 

 several separations were made with the Baby No. 2 machine, 

 sent on for the purpose by the De Laval Sc^parator (company. 

 The details of the work of these machines a fa shown in Tables 

 Vm and IX: 



