DO THE CREAMERY PATRON S HANDBOOK. 



more protein than they needed for the work they were doing, but of this 

 there is no evidence. The average amount of protein consumed, after 

 deducting .7 of a pound for maintenance of body, for each pound of milk 

 produced, is .05 of a pound. This offers strong evidence that cows do not 

 need as much protein as is prescribed in the feeding standards. Since 

 this experiment ended the 10th of February, there may be still a doubt 

 as to whether the cows could maintain a normal flow of milk during the 

 remainder of the winter on such a light supply of protein. Fortunately 

 the cows were started on another experiment the llth of February, com- 

 paring timothy with prairie hay, which covered a period of 70 days ending 

 the 21st of April, which was only about two weeks before they were turned 

 to pasture. The following table gives the daily consumption of nutrients 

 and yield of milk of each cow: 



There are features in this experiment which have a direct bearing on 

 the feeding standards. One is the small amount of protein fed, the other 

 is the large and uniform flow of milk during the winter. There was only 

 one cow that received as much protein as is given in the original Wolff 

 standard, and she gave during the second period, which covered 70 days, 

 an average daily yield of 40.82 pounds of milk with 2.59 pounds of protein, 

 while the Wolff-Lehmann standard prescribed 3.3 pounds of protein for a 

 daily yield of 27.5 pounds of milk. Countess consumed 2.40 pounds of 

 protein and gave 41.80 pounds of milk daily and after deducting the amount 

 of protein calculated for maintenance of the body, she used at the rate of 

 only .04 of a pound of protein to a pound of milk, being less than half the 



