ILLINOIS STATE DAIRYMEN'S ASSOCIATION. iqj 



ways throw away the first few streams of milk before milking. 



(Shows charts). We have here a chart and I will explain it. We 

 have here a plate and we put into this plate some bouillon and some gela- 

 tine that makes a semi-solid fluid. Decomposition can easily take place. 

 We put another plate on this and subject it to heat, sterilize it, kill every- 

 thing in there, and then set it away and it will stay that way indefinitely 

 so long as no life gets in the bouillon. Whenever we want to determine 

 the number of bacteria in a certain place, we just lift off the cover and 

 expose it for a minute, or two minutes, or more. Now we put these 

 plates in an incubator to keep the temperature where they grow best, and 

 have upon these colonies the bacteria forms. They are simply large 

 masses of bacteria. These charts are supposed to be illustrations of such 

 plates. 



We have here a plate with a hair on it. This has been in the incu- 

 bator. We can easily see the large masses of bacteria growth around 

 that hair. It is not, the hair that causes the fermentation, it is what is 

 on the hair. 



When you strain milk you need not think your remedy the effect by 

 straining out the hairs, for you are simply washing the hair off and put- 

 ting the filth into the milk. So it is necessary to take the hair out before 

 you put through another batch of milk. 



Here is a straw that shows the same results. Straw does not spoil 

 milk, it is what is on the straw. 



Mr. Coolidge: Where was that straw taken from? 



A. Any straw, right from the stack, dusty straw. 



Here is a chart represents a drop of milk, what is called the fore milk. 

 Look at the bacteria in that milk. That is the reason we should throw 

 away the first few streams. 



Mr. Cooper: Is that first stream necessarily imperfect? 



A. It always is. It is very seldom it is not imperfect, because the 

 cow is exposed to bacteria to sue Vi a great extent that it is invariably 

 imperfect. I have never run aero ?s one that was not thoroughly imper- 

 fect. The whole milk is imperfect to a great extent, even the milk in the 



