1895.] 



PUBLIC DOCUMENT — No. 33. 



49 



failed to find any change in the composition of the milk that 

 could be traced to food influence. 



The New Hampshire Experiment Station * failed to note 

 any decided improvement in the quality of the milk when 

 rations containing sufficient digestible organic nutrients 

 were fed, ])y varying the digestible protein from 2 to 3 

 pounds daily. 



The Iowa Experiment Station in 1891 published the results 

 of an experiment made " to determine the eft'ect of food upon 

 •the quality of milk," without apparently endeavoring to note 

 the eflect of any particular group of constituents in the fodder 

 ration. They compared the eSect of corn meal (low in pro- 

 tein) with gluten meal (high in })rotein). They really fed 

 one ration containing but 1.05 pounds of digestible protein 

 and another containing 2.18 pounds. Four cows, averaging 

 1,000 pounds in live weight, were used in the experiment, — 

 three grade Shorthorn and one grade Holstein. It is impos- 

 sible, for lack of data, to calculate accurately the amount 

 of digestible nutrients fed, but an attempt has been made 

 below to get an approximate idea. It appears that neither 

 the corn fodder nor the clover hay was tested for moisture 

 or subjected to analysis. 



* Bulletins 9 and 10. 



