Cbeam Raising by Dilution. 



131 



in regard to applying the pressure quickly (from six to eight 

 seconds were usually required to raise the pressure to thirty 

 pounds per square inch) to apjjly the proper amount of pressure 

 (thirty pounds) and to allow the pressure to" remain on the speci- 

 fied time (two minutes). The milk was diluted with one-fourth its 

 weight of cold water and was set in the can provided by the 

 company, in the open dairy-room, except in a few instances ^vhen 

 Cooley cans were used. At the time each test was made, anoth(T 

 sample of the same portion of milk that received no treatment 

 whatever was set by the side of the treated portion of milk in n 

 Cooley can. The can accompanying the Berrigan separator was 

 only a little more than half as deep as an ordinary Cooley can 

 which is twenty inches. In all cases the mixed milk of tlu: 

 University herd was used, and the details of the experiment are 

 shown in the table below: 



Table VI — Berrigan Separator. 



DATE. 



March 15 , 

 16 

 16 

 17 

 17 . 

 17 , 

 17 . 



19 , 

 20 

 20 

 20 



20 . 

 21 



21 , 

 26 



26 , 



27 , 

 27 

 26 , 



28 , 

 2J , 



29 , 

 S""' . 



30 , 



Average 



a 



3 

 o 

 p. 



30 



28 



36 



36 



36 



28 



36 



32 



32 



36 



28 



36 



28 



35.5 



28 



36 



32 



36 



.32 



.36 



32 



36 



32 



36 



10 



7 



9 



'7 



's 



8 

 '7 

 '7 

 '7 

 '8 



's 



P. 

 3 



H 



54 

 53 



54' 



'54' 



62' 

 63 



63' 



54' 



60' 



54 



55' 



56' 



56' 



73 

 a 

 s 

 o 

 p. 



03 



26.5 

 27. 

 29.5 

 31.5 

 29.5 

 29. 

 29.5 

 -30. 

 28. 

 29.5 

 29.5 

 29.5 

 30. 

 29. 

 22.25 

 ■30.5 

 26.25 

 29.75 

 25.5 

 29. 

 25.5 

 29.5 

 25.5 

 29. 



rs 



o 



o 



13.5 



8. 



6.5 

 13.5 



6.5 



6. 



6.5 

 10. 

 12. 



6.5 



5.5 



6.5 



5. 



6.5 

 12.75 



5.5 

 13.75 



6.25 

 14.5 



7. 

 14.5 



6.5 

 14.5 



7. 



o 



<«■? 





3.4 

 4.2 



3!6 



sie 



3!7 

 S.7 

 .3 ".8 



4!i 



4!5 



4!' 



4!4 



Berrigan 



teeatment. 





.43 

 .35 



ieo 



!73 



!73 

 .60 



185 



!69 



ies 



!63 

 !46 

 !38 



!.56 



.59 



.38 



.40 



'!g6 



..54 



.42 



.72 

 '!59 

 "!43 

 "41 

 '!29 

 ".24 

 '!32 



.43 



Untreated. 



la 



11 



1.12 



■i!i2 



.88 



'i'M 



"i!22 



1.34 



"!9.5 



1.06 



8:^ 

 , S to 



fa A 



.79 

 '!92 



.72 



Ira 



1.04 



■'.'so 

 'i!68 

 ' ' ."95 



"!77 

 .87 



It will be seen that while better results were obtained by the 

 Beriigan ti-eatment than in the untreated milk set alongside, yet 

 the results obtained (.59 of one per cent of fat in the skim milk) 



