Tests of Cream (Separators. 



6^9 



TABLE X.— UNITED STATES. 

 Eated Capacity, 2,000 Pounds Per Hour. 



In Table X are shown the tests of five machines of the United 

 States manufacture ; three of them — factories 4, 10 and 16, of the 

 new style, or style "B" with the cups in the bowl, and two facto- 

 ries — 15 and 20, of the old hollow-bowl type. In regard to these, 

 it shonld be noticed that in factory No. 16 the operator was very 

 careless, both as to uniformity of speed and uniformity of tempera- 

 ture. The machine was set upon an ordiuary floor and did not run 

 steadily. It should be said, also, in regard to the machine in factory 

 1^0. 20, that this, too, although sitting upon a stone foundation, ran 

 quite unsteadily. A perceptible jar, to which the operator called 

 attention, was noticeable throughout the whole run. 



In regard to the tests as a whole, it will be seen that the percent- 

 ages of fat are considerably higher than those found in the machines 

 used at the Station ; and it will be seen, also, that in most of the 

 different kinds of machines there is quite a large variation between 

 the highest and lowest percentage of fat — in every case amounting 

 to 100 per cent., and in most cases to considerably more. 



It will be further noticed that in the case of all of the various 

 makes, except the Jumbo, at least one of the machines tested did 

 what is called " practically clean skimming ; " that ie, the percentage 

 of fat in the skim milk was one-tenth of one per cent, or less. In 

 the case of the machines where a greater percentage was left in the 

 skim milk, in many cases it was evidently due to carelessness of the 

 operator ; but, in other cases, it seemed to be some inherent quality 

 of the machine. This was noticeably the case in factory No. 10 



