206 ANISI UAL REPORT. UF THK Off. Doc. 



QUESTION: ''What is the effect of the source of protein upon the 

 amouut reijuired?" 



DK. AliMSBY : That was practically Prof. Ilamilton's question. I 

 think we may fairly say, so far as we have any evidence, that the 

 protein from the grain is substantially the same if it is equally di- 

 gestible. In the case of succulent, soiling crops, it is nearly or quite 

 as good as the grain. In the case of coarse fodders, it is probably 

 somewhat less valuable. 



PKOF. HAMILTON: Do we understand you correctly when we 

 conclude that instead of following what has been called the balanc- 

 ing of a ration which is one to six or one to eighty that the proper 

 method is to give a fixed quantity of protein and then to add carbo- 

 hydrates according to the appetite of the animal — for instance an 

 animal eats twenty pounds of food a day, and another of the same 

 weight with a better apjietite eats thirty — that we make the differ- 

 ence in the carbohydrates, but that we give each of the other ani- 

 mals the same amount of nitrogen. 



'O"- 



DR. ARMSBY: It would figure out to that if they were producing 

 lUe same amount of milk. What I said was that I thought this was 

 a simpler way of looking at the problem. What I should say in 

 practical feeding, would be to make up a mixture of grain that I was 

 pretty certain had enough protein. Theoretically, we could figure 

 out a sliding scale. It don't seem to me to be practical in actual 

 feeding to carry out that plan; what we should have to do would be 

 to make a grain mixture or ration which we were pretty certain con- 

 tained as much protein as the cow would probably require, and then 

 vary the quantity of that ration according to the appetite of that 

 animal. That would result, theoretically, in giving your hearty eater 

 some excessive protein, but it would not hurt the animal, and we 

 would better do that than try to introduce great refinement of cal- 

 culation. 



MR. HOWDEN: I would like to ask a question in regard to lice 

 on steers in spring, or dairy cows. Is there any remedy through 

 the feed to prevent that, instead of an outer application? 



DR. ARMSBY: I don't know; perhaps some one else here does. 



MR. McCREARY: I don't believe, if you give them lots of feed, 

 that you will have any lice on them. 



MR. HOWDEN: That don't go down with us. I have found them 

 in the spring in warm stables and they have lice on them; they usu- 

 ally start on the shoulders. I heard Dr. Thomas of the Ohio Uni- 



