1902.] DISCUSSION. 267 



Mr. HiNMAN. Is it not a fact that a great deal of dirt 

 is carried in by the continual pouring, which has a tendency 

 to render it soluble. That, of course, you wouldn't find in 

 the milk. You take a little bit of manure that is reasonably 

 hard and let that get into the pail, and when the milk is 

 strained that will be strained out, but I should think with 

 this pail, where you keep pouring a rapid stream of milk in, 

 that these little lumps and pieces would come directly under 

 the force of the stream and would become so disintegrated 

 or dissolved that you would never find them again. Isn't 

 that worse for the milk? 



Mr. Stocking. You probably never would find it in the 

 milk, but you would find it in the results on these filter papers, 

 I feel very certain. You will notice on some of those papers 

 a dark brown color. That is almost entirely due to dissolved 

 manure that got into the milk. In the tests to which these 

 samples are subjected, all of that was thrown out. You know 

 what the force of a centrifugal separator is. The machine 

 that I use ran about 15,000 revolutions per minute. I feel 

 quite certain that practically all of that dissolved manure 

 came out in the washing. 



Question. Did you have any trouble with the milkers 

 in using these closed pails? 



Mr. Stocking. I do not think that the pail we use is 

 very difficult to handle. The opening in the pail is about 

 four and one-half inches in diameter and near one side of the 

 cover. I have not used one of them myself, although I am 

 in the barn every morning, but we have had dozens of dif- 

 ferent milkers and they all say there is no difficulty in learn- 

 ing to use it handily. Within a day or two several of them 

 have said that they thought they did not spill as much milk. 

 I suppose it is simply because they have to take a little more 

 pains to shoot straight and they get it all in. The principal 

 advantage, of course, is in keeping the dirt out. 



After we had found how much dirt got into the closed 



