2 9 



taken. The speed of this separator was 7000 revolutions per min- 

 ute, but operators often ran it up to 9,000 and above. 



Among the numerous other machines that have been con- 

 structed, I mention a Danish one called the "Alexandra," in Eng- 

 land, the "Balance" in Germany and France and "Jumbo" in 

 America. The bowl rests loose on the spindle and thus balances 

 itself. Fig. 17 represents the latest Danish make, which now, 



('Fig. 17) 



(Fig. 18) 



since the original "Alpha" patents have expired, has been pro- 

 vided with plates similar to those used in the "Alpha." 



In England the Victoria discharges the skim milk at the bot- 

 tom of the bowl. 



In America Sharpies first copied the DeLaval, and later con- 

 structed the "Russian," in which the bowl is provided with a 

 steam turbine attachment, and is rotated by steam directly. Later 

 he introduced his "Tubular" (Fig. 18), in which the bowl, 

 nearly two feet long and only four inches in diameter, revolves 

 about 22,000 times a minute, and he has now also put in an 

 "insert" somewhat like the "Simplex" but with the blades screwed 

 together. 



The original Danish Weston were modified and greatly im- 

 proved by Messrs. A. H. Reid, Springer and A. H. Barber & Co., 

 but is not sold now. 



In 1891, the DeLaval Company adopted an improvement 

 which consists of a series of discs (Fig. 19) which divide the 

 milk into thin layers and this increases the efficiency of the 



