696 Agricultural Experiment Station, Ithaca, N. Y. 



the determinations were made with the new B. & W. double- 

 necked bottle for testing skim milk and buttermilk. We have 

 found this bottle .much more convenient and more accurate for 

 testing skim milk than the ordinary skim milk Babcock bottles, 

 because of the ease with which it is possible to measnre 

 slight differences in percentages of fat. We have found, too, 

 in comparison with the skim milk Babcock bottle, that the B. 

 & W. bottle will give a slightly larger leading of fat. At each 

 time a sample of milk was taken the temperature of the milk 

 running into the bowl and the speed of the bowl were also taken. 

 The capacity was found by timing the whole length of the run and 

 reckoning the capacity per hour from the whole amount of milk 

 separated in all cases where only one machine was used. In cases 

 where there was more than one machine in tlie factory and both 

 were fed from a common vat, the capacity was found by catching 

 and weighing 'the skim milk and cream delivered for a certain 

 definite time during the run. 



TABLE VII.— ALEXANDRA JUMBO, 

 Rated Capacity, 2,000 Pounds Per Hour. 



Range 

 of speed. 



7,000-7,400 

 6,800-7,200 

 6,300-6,900 

 6,600-7,100 

 6,200-7,400 





03 u 



as 



■a ft 

 s 



3 



o 



1,344 



1,170 

 1,611 

 1,882 

 1,814 



1,564 



""a 



<M " 



p.1 



.25 

 .15 

 .20 

 .20 

 .33 



.23 



In Table YII are shown the tests of five different machines of 

 the Alexandra Jumbo manufacture. The most remarkable thing 

 in regard to them, it will be seen, is that most of them were run at 

 a capacity quite a little below that rated by the manufacturer, in. 

 nearly every instance the operator taking rather thin cream. 



