2.29 13.43 



In period two, palm oil was added to the ration of Duchess, 

 corn oil to that of Princess Leto, and cotton-seed oil to that of 

 Maramee — in all cases at the rate of 12 ounces per 1,000 

 pounds live weight. As fats are reckoned as two and a half 

 times as valuable as other non-albuminoids, this addition 

 widened the nutritive ratio to i : 6.8, We were able to obtain 

 but a small quantity of corn oil, and the supply gave out after 

 feeding ten days. Princess Leto then returned to Ration A for 

 the remaining six days of period two. At the beginning of 

 period three we were obliged to substitute clover hay for the 

 four pounds of vetch hay previously fed, thus slightly widening 

 the nutritive ratio to i : 6.9. Duchess now received stearin, and 

 Princess Leto had oleo oil. Maramee was given cocoanut oil, 

 but soon went off feed and was dropped from the experiment. 



In period four, Duchess was fed cotton-seed oil and Princess 

 Leto cocoanut oil. At the close of period four both cows re- 

 turned to the ration which had been fed previous to the experi- 

 ment. This they received until they went to pasture, May 30. 



The milk from each cow was analyzed daily, and determina- 

 tions of caseine were made by Mr. E. P. Stone, from a com- 

 posite sample taken from the milk of the last five days in each 

 period. At the close of each period milk from each cow was 

 separated, the cream held in cold storage until the next day, 

 and churned while still sweet. Analvses of the skim milks 

 and buttermilks were made, and samples of butter reserved 

 for examination. The comparative hardness of the butter was 

 determined by Prof. C. L. Parsons, as described in previous 

 papers. Chemical investigations of the butters were carried 

 out by Prof. F. W. Morse, chemist of the station, the results 

 of which appear in Bulletin 16. The separation of cream 

 from the milk was effected with a DeLaval Baby Hand Sepa- 

 rator, at a temperature of 90° F., with the exception of the 

 lots of July 4, when the temperature was 85° F. The follow- 

 ing table gives all the data of general interest : 



