60 THE BOOK OF BUTTER 



internal bowl parts, such as disks, cones, and blades. 

 The purpose of these parts is to form pathways for the 

 skimmed-milk and the cream to pass each other. It must 

 be remembered that these devices do not cause separation ; 

 they simply aid the centrifugal force. The introduction of 

 these devices has made possible the use of a much smaller 

 bowl for a given capacity. In the evolution of improve- 

 ment in this direction, the bowls of cream separators have 

 become lighter, and they are consequently easier to turn 

 and to handle. The separator referred to as being the 

 one exception has a long and narrow tube-like bowl, in 

 the smaller sizes in which it is manufactured. It should 

 be understood that the small tubular bowl is so narrow 

 that the disks, blades, and the like are not necessary. 

 The length of this bowl permits the milk to be subjected 

 to the centrifugal force for a sufficient length of time to 

 cause efficient separation without the use of the bowl 

 devices. 



The first bowl device to divide the milk in layers was 

 the disk. It was invented by Baron Clemens von Bechtols- 

 heim, a German living in Sweden, in 1888. Immediately 

 after this invention, the manufacturers of separators 

 recognized that the big hollow bowl was a thing of the 

 past. It is interesting to know that the bowl of the Danish- 

 Weston separator was large and ungainly. It was 15 

 inches deep by 24 inches in diameter and weighed 100 

 pounds. As a result of this new invention, an agreement 

 was made in 1889 by Bermstrom, president of the Aktie- 

 bolaget Separator, and D. H. Burrell of Burrell and Whit- 

 man, whereby Burrell and Whitman, later D. H. Burrell 

 and Company, obtained an agency of the DeLaval 

 separator in the United States. It must be remembered, 

 however, that the American DeLaval Company continued 



