44 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



rock phosphate because sometimes it does not give good 

 results, and I will discuss that this afternoon. 



If there is not sufficient phosphorus in the ration, if 

 a man is feeding a mixture which does not include one- 

 fifth of these high phosphorus feeds, instead of using 

 ground limestone or calcium supplements, I would advise 

 him to use two to four pounds of ordinary bone meal or 

 bone black in every one thousand pounds of bone mixture; 

 and if you have had any trouble from goitre or big neck 

 in calves, then use the iodine treatments. Where you have 

 not had any trouble from that, I would not recommend 

 that as being an essential. In my opinion it is entirely 

 unnecessary to purchase a complicated mineral mixture for 

 dairy cows. 



In closing, just what is the importance of the new 

 substances discovered, the vitamines, in the practical feed- 

 ing of dairy cows? Several rather extensive books have 

 already been written on vitamines, chiefly as applied to 

 human nutrition. We wont have time to discuss those, the 

 history of their development we are not concerned with 

 very much, but I will merely point out the practical appli- 

 cation of each one of these vitamines to the practical feed- 

 ing of livestock. 



Vitamine A or the first class of vitamine is very solu- 

 ble and is of tremendous importance to the dairy industry. 

 This vitamine is essential for growth and even for the main- 

 tenance of health for adults, and we are proud of the fact 

 that dairy products, including butter fat, are one of the 

 best means of supplying this vitamine to the human race. 

 So there again is one of the fundamental reasons for the 

 use of dairy products in the human diet. 



There is no product on earth for human feeding that 

 has the advertising possibilities of whole milk and other 

 dairy products, and I don't believe yet that the dairy indus- 

 try has begun to realize the possibilities from the wise use 

 of advertising the increased use of dairy products. If we 

 advise people to eat more of this, that and the other thing, 

 it means they will eat less of something else and maybe 

 they will not be any better off, but we can feel whenever 



