The Relation oe Food to Milk-Fat. 53 



12 to 24 ponnds per bead daily where it was held for two months, 

 when it was decreased gradually until the cows went to pasture 

 May 1. 



The nutritive ratio varied from 1:40 to 1:9.4. He found "that 

 the increase of feed was accompanied by a considerable increase in 

 the pounds of milk produced, and consequently in the pounds of 

 solids, fat, and solids not fat in the milk ; but with the exception of 

 one or two days, there were no greater changes in the [>ercentages 

 of fat in the milk after the increase of feed than before it was 

 made." 



Wilson, Kent, Curtiss and Patrick- compared corn and cob meal 

 with sugar meal by feeding them to four cows in alternating periods 

 of 21 days each with a 10-day preliminary period, and conclude that 

 " quality of milk, so far as measured by its percentage of fat, was 

 changed by feed to a much greater degree than was quantity. 

 Sugar meal produced 17 per cent more fat and six per cent more 

 total solids per 100 pounds of milk than did the corn and cob meal." 



Armsby,t during three periods of three weeks each v/ith two cows 

 compared bran with corn meal and found that while there were slight 

 changes in the composition of the milk there was " no indication that 

 the feeding had anything to do with these changes." Again in com- 

 paring in a similar manner bran with oil meal there were slight 

 changes as before, but " we may safely conclude that whatever changes 

 took place in the composition of the milk-solids were due to advanc- 

 ing lactation and not to the feed." 



Woll:|; in comparing the feeding value of ground oats and bran 

 for milk production, found that " the cows invariably did better on 

 oats, going up in milk yield when coming on oats and going down 

 when bran was fed, while the fat content of the milk remained the 

 same on an average." 



Linfield § studied the effect of two rations varying in nutritive 

 ratio on the per cent of fat in milk with ten cows during eight 

 periods of three weeks each. He concludes, " thijs test adds but 



*Iowa Station Bulletin 14, 1891. 



f Wisconsin Station Annual Report 1886, pp. 115 and 130. 



X Wisconsin Station Annual Keport 1890, p. 65. 



§ Utah Station Bulletin 43, 1895. 



