Concentrated JFoods and Milk. 481 



brewers' grains in the wet state and in excessive quantity 

 were, how^ever, excepted from this general statement. The 

 decrease per cent, in the flow of milk below the estimated 

 normal' yield during the periods when foods possessing a 

 high albuminoid ratio were supplied to the cows was calcu- 

 lated to be as follows : Vetches, 38-5 ; beans, 24-0 and 14*8 ; 

 decorticated cotton cake, I5'8 ; decorticated cotton-cake 

 and meal, 8*3; cummins, 23°3. 



Experiments of a somewhat similar character to those 

 referred to above on the rational feeding of milch cows have 

 been carried out on a more elaborate scale for some years 

 past at the physiological experimental station of the agricul- 

 tural academy at Poppelsdorf, Bonn, by Drs. Hagemann 

 and Ramm, and reports of the results obtained have been 

 published in the Landwirthschaftliche Jahrbucher, The prime 

 object of these experiments was also to determine the 

 influence of concentrated foods on the production of milk 

 and meat. 



In the more recent of these investigations, which w^ere 

 under the direction of Dr. Hagemann, the special foods sub- 

 mitted to trial were maize, rye, wheat pollards, cottonseed 

 meal, earth-nut cake, poppyseed cake, bruised barley, 

 malt sprouts, palm-nut cake, and molasses, in addition to the 

 ordinary provision of hay, straw, and roots. The proportions 

 of the articles constituting the ordinary ration varied with the 

 nature of the concentrated fodder : the daily allowances were 

 as follows: — Hay, from lbs. to 13 J lbs.; straw, 2 lbs. to 

 6 lbs.; and roots, 48 J lbs. to 61 J lbs. In addition to this 

 standard keep there was given at different periods one of the 

 following rations : — 13I lbs. of maize, iij lbs. to 13^ lbs. of 

 wheat pollards; 13 lbs. of rye ; ^\ lbs. of rye and /\\ lbs. of 

 palm-nut cake mixed; 3f lbs. to 4f lbs. of cottonseed meal ; 

 3 lbs. to 31 lbs. of earth-nut cake ; 5 lbs. to 5 I lbs. of poppy- 

 seed cake ; 9 lbs. to 10 lbs. of malt sprouts ; 8 lbs. to 10 lbs. of 

 bruised barley, mixed with 4 lbs. to 6 lbs. of palm-nut meal ; 

 and 7f lbs. of molasses mixed with other foods. 



In summarising the results of his experiments. Dr. Hage- 

 mann states that the production of milk proved to be 

 dependent in certain respects upon the nature of the food 



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