575 



GG to 84 poniuls, and of serradella from G3 to 85 ponnds, showing but little 

 preference for one as compared with tlie others, the difference in tbe 

 daily consnmption of tlie green fodders being- due largely to their vari- 

 ations in dry vegetable matter during the progress of the experiment." 



The amount of food consumed per day, dry matter in the same, milk 

 ])roduced, dry matter consumed per quart of milk, nutritive ratio of 

 rations, total and net costs of food i)er quart of milk, composition 

 of milk, and the live weight are tabulated for each animal by periods; 

 together with analyses of the corn meal, wheat bran, gluten meal, hay, 

 vetch and oats, cow-peas, and serradella fed, with reference to fertiliz- 

 ing ingredients and to feeding value. In calculating the cost of food 

 the following prices were allowed: corn meal $19, wheat bran $18.50, 

 gluten meal $22, vetch and oats $2.75, cow-peas $3.14, serradella $3.1G, 

 and hay $15 per ton. The same allowance was nmde for the fertilizing 

 ingredients in the food as in the previous experiment. 



"The results obtained fully sustain the conclusions presented in our 

 previous reports." These are in brief as follows : A smaller amount of 

 dry matter sufficed for the production of one quart of milk where a part 

 of the hay was substituted by the green fodders than where the full 

 ration of hay was fed, "indicating a superior nutritive value of the 

 former as comi)ared with the latter. The milk was in every instance 

 increased by changing from a hay ration to a green-fodder ration. The 

 quality of the milk was but slightly altered; the solids were in some 

 cases slightly increased and in others they were slightly decreased." 



"The net cost of food for tiie production of milk was in every 

 instance less in case of the green -fodder rations than with the hay 

 ration. The weight of the animals in most cases increased towards the 

 close of the exj)eriment." 



(3) Coat of food for the production of mill- (pp. G4-72). — A record is pre- 

 sented of twelve grade cows which have been used in various experi- 

 ments at the station since 1884, primarily to test the effect on the cost, 

 quantity, and quality of the milk, of substituting corn fodder, corn 

 stover, silage, and root-crops in i)arc or wholly for hay. The coarse 

 fodders fed at different times were hay, dry fodder corn, corn stover, 

 silage, roots, various dried fodder cro])s, green fodder crops, as vetch 

 and oats, barley, vetch, serradella, and cow-i)eas; and the grain food 

 consisted variously of corn meal, coru-and-cob meal, wheat bran, and 

 usually gluten meal. "Twenty per cent loss of the fertilizing constit- 

 uents contained in the food has been allowed for the amount sold with 

 the milk. The ])eriod of observation varied, in the case of different 

 cows, from 2G1 to 747 days; the average daily yield of milk per head 

 for the whole period of observation varied from 7.7 to 12.4 quarts." 



The tabulated data include the history of each cow, milk yield, live 

 weight, amount of each kind of food consumed, local value of the mate- 

 rials fed per ton, value of the fertilizing ingredients in the same, the 

 total value of the milk produced by each cow at 3 cents per quart, 



