ILLINOIS STATE DAIRYMEN'S ASSOCIATION 97 



including case costs about Ten Dollars. This simple test with 

 only two bottles can be bought for Three or Four Dollars the 

 whole outfit. Five Dollars will buy a complete outfit. You 

 should test once a month through lactation period, four milk- 

 ings, this morning, tonight, tomorow morning and tomorrow 

 night will give a fair average for the month. An hour's work, 

 or two hours' work once a month will give a man a good idea 

 of the comparative value of the cows in his herd, and any one 

 can do it down to the fourteen year old. You can learn in two 

 or three hours. 



There is a course beginning the 20th of this month a two 

 weeks dairy school course which ought to have a thousand boys 

 from this state learning to test milk for the dairy farm, and go 

 back from the university and do this work on the farms, 



I will go ahead w-ith this testing. 



DISCUSSION. 



Q : — What temperature for accurate testing ? 



A: — Anywhere between 55 and 70. If too cool, you do not 

 get action enough on the acid and will get a white curd that has 

 not been cut up by the milk. If too hot the acid will act too 

 strong and will have burnt sugar and not able to read it. It 

 should be somewhere near 60 to 70. It is rather cool this morn- 

 ing, and I will have to use a little more acid. 



: — Very frequently I have a cloudy spot in the neck. 

 And then it will be clear and the lines will cut. Is that foreign 

 matter in there? 



A : — No I think it has been a question of how the acid has 

 been added and the strength and temperature of the milk. If 

 a little variation and then sometimes things happen and you 

 cannot tell why it is. As far as I know the samples have all been 

 treated alike, and as you say, some have cloudy matter in them 

 and we do not know the reason why. If it is anything enough to 

 interfere wnth the test I can tell why it is. If enough cloudy 

 material I can generally see it is because the milk or acid is too 

 cool. Very frequently in doing that work a man is in a hurry 



