1890.] PUBLIC DOCUMENT — No. 4. 119 



through the season than she will if she is watered but once. 

 It does not make any difference whether you are feeding 

 all dry feed or feeding ensilage and roots. A cow fresh in 

 milk will drink more water if fed with dry feed than a cow 

 that has been giving milk for eight or nine months ; and 

 invariably fresh-milch cows will drink twice a day, and 

 generally three times a day. 



Professor Cooke. We have repeatedly tried our cows, to 

 see whether they would drink even a second time. It is 

 very seldom that we can get them to touch water a second 

 time. 



Question. Can you tell us the aggregate of the milk in 

 the experiment you referred to ? 



Professor Cooke. I cannot. We only finished that ex- 

 periment about a month ago, and have not written up the 

 figures yet ; but I have looked at them sufficiently to be able 

 to say that there were cows on both sides. I can give you a 

 little account of another experiment, which has been written 

 up enough so that we do know the result. That was an 

 experiment in changing from hay to pasture. I think every 

 one who has written on this subject ^ — at least, so far as I 

 have been able to find — has claimed that when a cow goes 

 out from the dry feed of winter to pasture there is an increase 

 in the amount of milk and a decrease in the quality of the 

 milk. To see whether that will hold in all cases, we tried it 

 on eleven cows last spring, and we found that in the aggre- 

 gate it would hold ; that there was quite a decided increase 

 in tne aggregate amount of milk given, and there was also 

 a decrease in the quality, — not very large, not so large as 

 we had expected, but there was in the aggregate a decrease 

 in the quality. But the increase in quantity more than over- 

 balanced the decrease in quality, so that there was in the 

 aggregate an increase in the amount of butter produced. 

 But when we came to analyze, we found that some cows 

 were on one side and some on the other ; but the cows that 

 were on the negative side were a good deal more than over- 

 balanced by those on the affirmative side, so that the aggre- 

 gate resulted as I have said. 



Mr. HiCKOX. Can those who sell the better grades of 

 butter tell when bran or Indian meal has been fed ? It is 



