1907.] PUBLIC DOCUMENT — No. 33. 91 



and at present there are 8 Guernseys and 32 Jerseys under- 

 going yearly tests. Tests are likewise being conducted for 

 the National IIolstein-Friesian Association. These are 

 mostly seven-day tests for milk and butter fat. Occasionally 

 breeders test their animals for thirty and even ninety days. 

 The test of the Holstein cow De Kol Creamelle No. 59158, 

 belonging to Mr. D, W. Field, which yielded in one hundred 

 days 10,017 pounds of milk containing 284.088 pounds of 

 fat, was made by Mr. A. D. Guiel of this station. During 

 the year 72 Tlolsteins have been tested, requiring the ser- 

 vices of five men at different times during the year. The 

 station does not publish the results obtained, but reports the 

 same to the several cattle clubs, and keeps a duplicate record 

 on file. It must be understood that the making of appoint- 

 ments for tests, the furnishing of apparatus, the securing of 

 the necessary comj^etent men and the verifying of the re- 

 sults require considerable time and thought, and necessarily 

 interfere with the other work of this department. 



Work completed. 



Molasses. — There has been completed a repeated experi- 

 ment with Porto Rico molasses as a food for dairy stock. 

 Digestion tests have likewise been made, in which it is sho^vn 

 that molasses depresses the digestibility of the other foods 

 with which it is fed. The entire results will be published 

 in bulletin form. Porto Rico molasses contains some 1,100 

 to 1,150 pounds of digestible matter to the ton, and has about 

 80 per cent, of the nutritive value of corn meal. 



Digestion Experiments with Sheep. — A large number of 

 digestion experiments have been completed with sheep, and 

 are published as Part XL of this report. Among the feeds 

 tested may be mentioned sorghum fodder. Green Diamond 

 sugar feed, different amounts of molasses, red and white 

 wheats and feed barley. 



The Physiological and Economical Value of Protein in 

 Milk Secretion. — Three experiments have been completed 

 concerning the protein requirements of dairy cows, and it is 

 intended to publish the results in the next annual report. It 

 was not possible to collate the data and prepare the same for 

 publication in time for the ])resent report. 



