MILK PRODUCTION 



331 



The experimental feeding by Eckles was in the years 

 1910-1911, and his observations continued for one year. 

 The various foods used were analyzed. Digestion experi- 

 ments were conducted during two periods, one with three 

 animals while they were on a maintenance ration, and one 

 with five animals when near the time of maximum milk 

 production. Eckles, therefore, secured rather more accurate 

 data than was the case with the other two experimenters. 

 He was able to calculate more nearly the exact digesti- 

 bility of the materials involved in the experimental work. 



With all three of these , experiments the amount of 

 milk produced was accurately determined and analyses 

 made to determine the percentage of fat. By ascertain- 

 ing, therefore, the estimated or the actual amounts of 

 digestible material fed and the milk production with its 

 fat-content, it was possible to calculate the relation to the 

 product of the protein and total nutrients digested. The 

 following table permits a comparison of the recommenda- 

 tions of the three experimenters based on the data secured. 

 A fuUer table appears later. (See Appendix.) 



Table LXX. Standabds for Milk Production as Developed 

 BT Haecker, Savage, and Eckles. Protein and Total 

 Nutrients for One Pound of Milk.* 



* In excess of maintenance needs. 



