pound for wheat bran. Each cow in each lot did not 

 receive exactly the same amount of food, but so far as 

 practicable it was the aim to make the total amount of 

 food of one lot equal, or nearly equal, to that of the 

 other lot. 



While the results have a very positive value for the 

 dairyman they should also convey to the grower of beef 

 cattle suggestions of almost equal value. 



The details of the first experiment recorded below 

 were under the immediate care of Prof. R. W. Clark. 

 In tlie later experi meats the writer was assisted by 

 Mr. J. M. Jones and by students. To the intelligent 

 care and interest of all of these are largely due the sat- 

 isfactory results obtained. 



Hairy Vetch Versus Wheat Bkax. 



This experiment extended over a period of eight 

 weeks during the winter of 1901-2. The rations were 

 reversed at the end of four weeks, so that the cows 

 which at first received an extra quantity of wheat bran 

 later had an extra amount of vetch hay. The first week 

 of each period was regarded as a preliminary period 

 and, as usual, excluded from the record. 



Everv cow received daily a basal ration which aver- 

 aged as follows : 



4 lbs. uncooked cotton seed. 

 2 lbs. wheat bran. 

 5.2 lbs. vetch hay (average*) 

 11.2 lbs. total basal ration. 



Besides the above, each cow in one lot received an 

 additional amount of vetch hay, which varied with the 

 appetite of the individual cow, and which averaged 6.6 

 pounds per cow daily, excluding the small amount 

 Avhich was offered but not eaten. 



The other lot of cows was fed, besides the basal ra- 

 tion, an additional amount of wheat bran, which extra 



