patent some half dozen or more manufacturers have adopted the 

 di^cs more or less modified. 



The discarding of the old ideas that the capacity of a 

 separator depended exclusively on the temperature, speed, diame- 

 ter and depth of the bowl, set many inventors 

 to work experimenting to find a substitute for 

 the Alpha Discs. Thus Melotte, of France, 

 inserted a number of polygonal vertical par- 

 titions in the bowl, but later changed this to 

 the insert shown in Fig. 21, and the capacity 

 of the U. S. Separator was increased by divid- 

 ing the bowl into compartments with two 

 inner bowls, which caused a sort of triple cur- 

 rent. 



The milk was fed into the top of the cover 

 where tubes conducted it to the inner cup in 

 which were wings that caused the milk to re- 

 volve with it. From here the milk passed into 

 the intermediate cup and from there into the 

 main bowl, so that before the milk left the 

 bowl at the bottom it had passed through three 

 different compartments. Later the inserts 

 were changed as shown in Fig. 22. 



Lefeldt filled his bowl with curious cellu- 

 loid tubes ; the ''National" used cylindrical par- 

 titions indented like a pineapple, and A. H. 

 Reid used corrugated cylinders. (Fig. 92.) 

 Lately D. H. Burrell & Co., of Little Falls, 

 N. Y., have introduced the "Simplex" Link 

 blade, called the "Globe," and other names in 

 Europe. In these the milk pursues a straight 

 course from the bottom of the bowl, where it 

 is delivered by the feed tube, shown to the 

 right in Fig. 23, to the top where it is thrown 

 out as separated cream and skim milk. 



The linkblades consist of a series of curved steel blades 

 hinged on bronze rings, so that when taken out of the bowl 

 they may be washed on both sides as shown in the center of 

 Fig;. 23. 



(Fig. 22) 



