ILLINOIS STATE DAIRYMEN'S ASSOCIATION. 2 27 



A: — A test of 4.2 for example, she will make about 4.9 of butter be- 

 cause the butter fat or oil is simply fat pure and simple, while butter 

 has about 15 per cent of water and salt in it. We usually add 1-6 to the 

 butter fat. 



Mr. Sprague: — Why is it if you can't feed butter fat into milk the 

 same herd will test a great deal different than others when a change of 

 feed is made? 



A: — I can't explain that. I have seen a cow that was fed the same 

 kind of feed test 3 per cent in the morning and 5 per cent at noon, and 

 she seemed to be perfectly normal. I cannot explain that. Hoard says 

 the darkest place on earth is the inside of a cow. 



Q: — Then in decreasing or increasing the butter fat in milk, if any 

 change is made at all, you say you decrease the fat in cows rather than 

 increase it? 



A: — I think decrease. But I cannot answer that question. A cow 

 sometimes becomes agitated and nervous, and that will make a shrinkage 

 in the milk and increase the fat. I have seen cows that were sick and 

 tested 16 per cent, but gave very little milk. Strangers coming around 

 nervous cows will make a difference in the amount of milk given. All 

 kinds of feed have been given them to increase the fat, but it makes no 

 difference, we cannot feed fat into milk. 



Mr. Campbell: — How do you account for the longer a cow is milked 

 the more the fat will increase, or rather hew do you account for a fresh 

 cow that out-tested any time during the year? 



A: — I cannot explain that. I think she must be a freak. There are 

 some things we cannot explain. The general rule, Mr. Campbell, is that 

 she increases in test as she advances in her period of lactation. The 

 total amount of butter fat will be less, but the test higher. 



-Outside conditions affect them 



— Y.es sir, a lot of things. Files and all such things affect them. 

 — Then if I want more butter, I must get different cows or in- 



crease the flow of milk' 



