Test of Cream Separators. 



16 



major portion of the power expended, while the actual work in 

 separating the milk appears to be roughly proportional to the 

 weight separated. The work done in separating is about .07 

 horse power per thousand pounds per hour. 



A noteworthy conclusion to be drawn from the test is, that the 

 geared form of separator is much more efficient than the belted 

 form. This may be due in part to slipping of the belts at the high 

 speed used. Much work is also absorbed in bending the belt as 

 it passes around the small pulleys. 



It may also be noted that the two machines, No. 6 and No. 5, 

 in which rope belts were used, were considerably more efficient 

 than No. 2 in which a leather belt was employed between the in- 

 termediate and the machine. 



S. Henry Barraclough, 



Lionel S. Marks. 



The .following table has been compiled from the report of 

 Messrs. Barraclough and Marks and shows not only the absolute 

 horse power required for each machine but also the relative 

 power based upon a capacity of 1000 pounds per hour. It will 

 be noticed in regard to the butter accumulator that the capacity 

 as given in the trial of Messrs. Barraclough and Marks is 240 

 pounds. This was the capacity noted while the machine was 

 running as an accumulator but as the power required was the 

 same both as an accumulator and as a separator and as the ma- 

 chine has been used mostly as a separator, we have calculated the 

 horse power per hour upon a basis of a capacity of 416 pounds 

 per hour as a separator : 



Table IX. 



Kind of machine. 



Sharpies' Standard Russian 



United States extractor separator No. 



3 (run as separator) 



De Laval baby No. 3 



Butter accumulator (as separator and as 



accumulator) 



Victoria 



Columbia No. i 



