44 AGRICULTURAL EXPERIMENT STATION. [Jan. 



lie claims that about 2.-5 pounds of diircstiblc ])rotein 

 should be contained in the ration fed in order to keep the 

 animal in good condition and to keep up the quantity of 

 milk for the longest possil)le time. 



Marcker and Morgen,* as a result of their experiments 

 with live difterent herds of cows, claim that more protein 

 than the current usage and feeding standards call for can 

 be economically fed, thus : — 



Digestible protein Cpounds), 

 Digestible fat (pounds s 

 Digestible cai-bohydrates (pounds), 

 Nutritive ratio, .... 



"While this might be economically true in sections of Ger- 

 many, it does not necessarily hold that it is economically 

 true in Massachusetts. 



Woll f has made quite a thorough inquiry into the rations 

 fed by successful dairymen in ditlerent sections of the 

 United States, and calls the average of his results the 

 American standard ration, which he believes to be correct 

 for the larger part of the United States. It is as follows : — 



Digestible protein, . 

 Digestible fat, 

 Digestible carbohydrates, 

 Nutritive ratio, 



2.15 lbs. 

 0.74 " 

 13.27 « 

 1:6.9 



He furnishes no results of experiments to prove this to be 

 the case, simply basing his conclusion upon the opinion of 

 dairy farmers. Whether the judgment of dairy farmers is 

 correct or not we will not at this jioint express an opinion, 

 but it seems to the writer a rather peculiar position for a 

 scientific in(|uirer to take. 



During the winters of 1892-93 and 1893-94 Messrs. 

 Woods and l'heli)s| made investigations concerning the 



* Tl6siim6 in Experiment Station Record, March, 1892. 

 t Bulletin No. 38, Wisconsin Experiment Station. 

 J Bulletin No. 13, Storr's Experiment Station. 



