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Feeds and Feeding. 



Arranging these results, we have : 



First trial ration for an 850-lb. cow producing 20 Ibs. milk daily. 



This trial ration shows a deficiency in both digestible protein 

 and energy value. To improve it we deduct 1 Ib. of corn meal 

 and add 2 Ibs. of gluten feed, which is the richest in digestible 

 protein of the available feeds. We then have : 



Second trial ration for an 850-lb. cow producing 20 Ibs. milk daily. 



This ration agrees closely with the standard. Thus, accord- 

 ing to the Armsby standard, a satisfactory ration for a dairy cow 

 weighing 850 Ibs. and producing 20 Ibs. of 4 per ct. milk daily 

 may be composed of corn forage, 12 Ibs. ; clover hay, 6 Ibs. ; corn 

 meal, 4 Ibs. ; wheat bran, 2 Ibs. ; and gluten feed, 2 Ibs. 



VII. THE SCANDINAVIAN FEED UNIT SYSTEM. 



A system of feed equivalents, based mainly on the extensive ex- 

 periments with milch cows and swine by Fjord and his successors 

 at the Copenhagen Station, has been adopted in Denmark and 



