THE SEPARATORS OF BURMEISTER AND WAIN. 



133 



two continuous ilanges in the inside, and a thickness of '25 centi- 

 metre. 



The hand-separator (K) has a horizontal drum, which, in the widest 

 place in the inside, is 10 -7 and in the neck 6 -7 centimetres wide. The 

 milk enters at one side of the drum, and on the other it passes through 

 an opening in the neck of the drum, the skim-milk being separated by 

 means of two white-metal tubes, which surround the neck of the drum. 

 One of these tubes, when the drum is at rest, can be adjusted either 

 narrower or wider. 



The Baby separator is, in essential points, of similar construction to the 

 separators for machine use. The drum is internally 9 -8 centimetres, and 

 round the neck 6 '6 centimetres wide, and is set in motion by means of a 

 toothed wheel. 



Both separators attain their maximum speed when the handle makes 

 40 revolutions per minute. 



We have to thank the Bergedoff Iron Works for the following 

 details: 



(c) Alpha Separators for Machine Use. These have been known 

 in Germany since 1890, and at present three different sorts are 

 manufactured, viz. Nos. (1), (2), and the Alpha pony (fig. 35). 



(d) Alpha Separator for Hand Use. These at present in use are 

 of three numbers: Alpha K with horizontal, and Alpha B, as well as 

 Alpha S or Baby, with perpendicular steel drum (figs. 36, 37, and 

 38). The drums of these three machines attain their most favour- 

 able speed when the handles make forty revolutions per minute. 



64. The Separators of Burmeister & Wain. As early as the 

 year 1872, the well-known chemist, Storch, of Copenhagen, drew the 

 attention of Danish agriculturists to experiments carried out by 



