ILLINOIS DAIRYMEN'S ASSOCIATION. 183 



Mr. Gurler: — Pay for the butter fat. We take a sample 

 and put it in a bottle. The man takes a sample of that cream 

 before he turns it into the can. 



Mr. Van Norman : — Do you expect him to exercise any 

 judgment or know anything about cream? 



Mr. Gurler : — He is supposed to, but does not always appear 

 to do so. 



Prof. Van Norman : — If he is supposed to know a little 

 something about cream there is no reason why he should not 

 take advantage of this test. Give him, then, a bottle of this 

 alkali solution. You can get him a pipette which has two marks 

 on it, one represents 17.6 cc and the other 20 cc, if that is your 

 standard, or whatever you are willing to accept. When you give 

 him his bottle of alkali in the morning, you can put into that 

 alkali enough indicator to make it a bright pink and it will save 

 him carrying a separate indicator, but that indicator will only 

 be all right for a day or two. He comes up to Mrs. Smith's house ; 

 he has weighed the cream and suspects it is not what it ought 

 to be. He takes out his pipette, measures into a clean cup or 

 sample jar 20 cc of alkali; with the same pipette he measures in 

 the 17.0 cc of cream; the house will have to furnish a little 

 water with which to rinse the pipette out so as to get all the thick 

 cream into the test jar. If the color disappears there is more than 

 20 per cent of acidity in it. So all the additional equipment 

 would be a pipette with two graduations on it, and a little bottle 

 of alkali. 



The President: — Who is to do this testing? 



Prof. Van Xorman : — That is for the driver, and how, the 

 driver would determine. That is one method. Another method 

 would be to test at the creamery the sample that the driver brings 

 in of each man's cream. 



Mr. Gurler : — They generally bring a small sample. There 

 is a difference where you use the Babcock test of two or three 

 ounces. 



Prof. Van Norman : — You will usually have enough cream 

 so the man at the factory can determine the acidity, but if you 



