THE LEFELDT SEPARATOR. 127 



canals, which lie behind the layer of cream formed during the 

 motion, into the internal portion. 



The cream flows over the surface of the lower circular opening 

 into the lower space of the covering of the drum, and the skim-milk 

 is conducted by means of four tubes, leading almost to the edge 



Fig. 29. Lefeldt's Separator. (Section.) 



of the drum and the drum-lid, and passes through the drum-lid into 

 the neighbourhood of the surface of the ring of milk, where it is 

 conducted into the upper covering. 



By setting the drum in motion one can make the exit for the 

 skim-milk at the upper end of the tube narrower or wider, so that 

 during the operation more or less cream may be obtained. A hand- 



