— l62 — 



each lot for the month of May and the first eight days of June 

 (the time of beginning the experiment) ; while the average analy- 

 sis of the mixed milked of each lot for the three days immediate- 

 h' preceding the experiment was almost identical both in total 

 solids and fat. The average number of days in milk was for lot I 

 i88 ; for lot II, 197. The average number of days in calf was for 

 lot I, 60 ; for lot II, 62. 



At the end of the first period of four weeks, it became evident 

 that the cows No. 3 in each lot were so far advanced in gestation 

 that the results would be materially affected if the experiment 

 were continued and as it seemed desiral)le to carry on the course 

 of feeding for a considerable time longer, these two cows were 

 dropped and the experiment continued with two in each lot. 



The Method of the Experiment. 



As has already been said Lot I received only the grass in the 

 pasture. Lot II beside the pasture received a grain ration consist- 

 ing of two pounds of cotton seed meal and two pounds of wheat 

 bran per cow per day. It was fed in two equal feeds morning and 

 night when the cows were brought into the stable to l:>e milked. 



The pasture was almost entirely blue grass on a dry gravelly 

 upland .soil and because of the frequent and heavy rains remained 

 plentiful and luxuriant during the whole course of the experi- 

 ment. 



The cows were milked at about half past four in the 

 morning, and about half past three in the afternoon, and 

 the milk weighed as it came from the cow. For three days 

 in each week the milk was analyzed. As soon as milked and 

 weighed, the milk of cows in the same lot was mixed and a sam- 

 ple taken. The evening sample was kept on ice until morning 

 and with the morning sample taken to the laboratory where the 

 two were thoroughly mixed and the fat determined by "Short's 

 Method" and the solids in the ordinary way. 



The experiment was begun by sampling and analyzing the milk 

 for three days to give data as to the exact condition of the milk at 

 the time of begiiniing. As the whole herd were receiving a grain 

 ration of about the same amount and character as the one fed, the 

 effect was rather that of taking away a grain ration than adding 

 it to the grass got in the pasture. 



