264 BOARD OF AGRICULTURE. [Jan., 



also. The small amount of milk that could be used in that 

 method was also a disadvantage. 



The next thing we tried was an ordinary separator. A 

 small machine was used, one of the simplest construction we 

 could get, and a certain quantity of milk was run through 

 this. The milk was followed through by a certain amount 

 of warm water at the same temperature as the milk, and when 

 we had secured a liquid of the necessary thinness this watery 

 solution was washed through the filter paper. That, of 

 course, separated the dirt that was contained in the sample 

 of milk. It was found after testing this method in a number 

 of different ways that so far as we could find out we had 

 practically all the dirt that the milk contained and nothing 

 else. So that the result we got, I think I am pretty safe in 

 saying, was pretty accurate. So much, then, for the method 

 of getting at the amount of dirt. 



As soon as we found that we were ready to start we se- 

 lected two cows in the barn, standing side by side, and in 

 order to have it uniform those cows were milked under nearly 

 as uniform conditions as we could get. The idea was to de- 

 termine, if possible, if we could not find a covered milk pail, 

 or some sort of a cover which would exclude dirt in milking, 

 and so keep it in better condition. The pail that we used 

 for this experimental work vsas one which I think was de- 

 vised by Mr. Stadtmueller of West Hartford. It is simply 

 a tin cover placed upon the pail and fitting tightly, and on 

 one side there is a tin cylinder soldered on, which is about 

 four inches in diameter. At the bottom of this there is a 

 piece of wire strainer. In that there was also placed two 

 thicknesses of cheese cloth, so that the milk in passing into 

 the pail had to go through these two thicknesses of cloth 

 supported by the wire gauze. These two cows were num- 

 bered " one " and " two," and when we commenced, cow No. 

 2 was milked into the closed pail and cow No. I'into the open 

 pail. Samples were taken from the milk and immediately 

 taken up to the laboratory and run through the separator 

 and the amount of dirt determined from each one. The next 

 day the test was reversed, cow No. 2 being milked into an 

 open pail and cow No. i into a closed pail, and the same 

 thing gone through with. This work was carried on for quite 

 a long time, alternating each day with the two cows, so that 



