412 Keport op the First Assistant of the * 



In table I\^ are given the average results obtained in a trial witb 

 seven cows during February and March. The average age was 3.4 

 years and the average time in milk was 5.5 months. 



During February corn silage was fed at noon, mixed hay 

 morning and night, and a mixed grain (N"o. 24) composed 

 of seven parts wheat bran, five parts wheat middlings, one 

 part linseed meal, O. P. and two parts cottonseed meal. The grain 

 represented 45.3 per cent, of the cost of the ration and the silage 16 

 per cent. The grain supplied 35.0 per cent, of the nutritive sub- 

 stance and the silage 24.5 per cent. 



In March hay was fed at noon, corn silage morning and night and 

 mixed grain the same as before. The grain represented 47.6 per 

 cent, of the cost of the food and the silage 32.0 per cent. The grain 

 supplied 34.4 per cent, of the total nutritive substance and the silage 

 45.7 per cent. There was not much change in live weight during 

 the trial, there being an average gain in February of four pounds 

 and during March of but one pound. The change in the ration to 

 more silage and less hay made but little reduction in the amount of 

 dry substance, but there was an increase in the amount of digestible 

 matter and the fuel value of tlie ration became somewhat higher. 

 There was no change in the nutritive ratio. Tlie cost of the ration 

 was made a trifle less. There followed a falling off in the milk 

 yield somewhat less than would be expected from the advance of 

 lactation alone, and but very slight increase in the percentage of fat. 

 There was little change in the cost of milk and fat produced. 



For the first period the greatest daily average milk yield was 30.1 

 pounds, and the smallest 8.8 pounds. The highest average per- 

 centage of fat was 6.16 and the lowest 3.03. For the second 

 period the extremes in average daily milk yield were 28.1 pounds 

 and 8 . 8 pounds, and in average percentage of fat 6 , 30 and 3 . 70 . 



