5-4 Bulletin 173. 



another item to tlie fairly well established fact that an increase in 

 the quantity of concentrated food in the ration of a cow does not 

 increase the richness of the milk provided the cows are well fed to 

 start with." 



Dean* carried on experiments during several years to ascertain 

 the effect of food on the quality and quantity of milk. The results 

 obtained from feeding coarse fodder with and without grain, from 

 comparing pasturage with and without grain, from feeding slop, and 

 from other experiments, generally agree with this statement made 

 in Bulletin No. 80, that " the general conclusion would seem to be 

 that the food does not affect the quality of the milk to any appreci- 

 able extent so long as the animals are in good condition.'' 



Speir f reports at least three different experiments on the effect 

 of foods on milk production. He tested a large number of different 

 kinds of feeding stuffs both singly and in various combinations dur- 

 ing periods of four to five weeks in length. Some of his conclusions 

 are that " an increase of oil in the food does not seem to give any 

 increase of fat in the milk. Rations having an extremely high 

 albuminoid ratio seem to have a depressing effect on tlie milk yield, 

 well mixed foods giving the best results in this respect. Every food 

 when first given, seems to have more or less effect in increasing or 

 decreasing the percentage of fat in the milk. This effect, however, 

 is transitory and the milk returns to its normal composition aljout 

 the end of the fifth week." 



Stohmann,:}; in experimenting with goats found that the fat con- 

 tent of the milk was proportional to the fat content of the fodder, 

 but by a great increase in the nitrogenous foods, the milk-fat did 

 not increase in the same way as when the fat content of the food 

 was increased. 



Kiihn§ carried on extensive feeding trials with bean meal, ])ahn 

 nnt cake and malt sprouts, having in all 42 experiments with 10 



* Ontario Agricultural College ana Farm Report 1891, p. 154; 1893, p. 148 

 1894, pp. 147 and 148. 



f Trausiictioiis of the Highland and Agricultural Society, Scotland, 1894, p. 83; 

 1896, p. 2G!); 1897, p. 296. 



^: Journal fiir r.;m(l\virtscliiift. 1S08, pp. 135. 307 and 420. 



§ Journal liir Laiidwirtschaft 25 (1877), p. 332. 



