New York Agricultural Ex^brimbnt Station. 33 



the rations. 



Coic 12. — The daily ration of this animal as established at first 



was as follows: 



Ration of Cow 12. 



Alfalfa hay 8 lbs. Rice meal 3% lbs. 



Oat straw 8 lbs. Oats (extracted) 3 lbs. 



Sugar beets 27 lbs. Corn meal (extracted) 2 lbs. 



Wheat gluten I14 lbs. 



After three w^eeks, including one week of preliminary feeding, 

 the wheat gluten was diminished one ounce per day and the rice 

 meal was increased by a like amount. This change was con- 

 tinued until no wheat gluten was fed. After seven days of 

 absence of wheat gluten from the ration it was again intro- 

 duced, one ounce the first day, two ounces the second and so on, 

 the rice meal being diminished to the same extent until the 

 original ration was reached. The feeding was then continued 

 on this basis. It should be said that a uniform addition of 1 

 pound of rice meal w^as made to the ration at the end of the 

 first month's feeding. 



This method of varying the ration allowed a very gradual 

 change in the protein supply in both. directions with no lessen- 

 ing of the supply of digestible organic matter, thus making it 

 possible to study the relation of protein to milk secretion with- 

 out the disturbing influence of sudden changes in the character 

 of the ration or of a deficiency of carbohydrates. 



Cow 10. — The basal ration of this cow consisted wholly of 



normal foods and was designed to supply a generous amount of 



vegetable oils. 



Ration of Cow 10. 



Mixed hay 12 lbs. Linseed meal , . 2 lbs. 



Sugar beets 27 lbs. Ground flaxseed 1 lb. 



Corn meal 4 lbs. 



The ether extract in this ration at first was about .8 lb. per 

 day and it was maintained at this amount for about one month 

 when it was gradually increased by a substitution of ground 

 flaxseed for a like quantity of linseed meal at the rate of ^ lb. 

 per day until the ether extract ingested daily was 1.4 lbs. 

 3 



