100 HATCH EXPERIMENT STATION. [Jan. 



Part II„ 



(a) THE EFFECT OF NARROW AND WIDE RA- 

 TIONS OX THE QUANTITY AND COST OF MILK 

 AND BUTTER, AND ON THE COMPOSITION OF 

 MILK. 



J. B. LINDSEY, E. B. HOLLAND and GEO. A. BILLINGS. 



Results of Two ICxperiments. 



I. Definition : By narrow ration is meant one containing 4 

 to 5 times as much carbohydrates as protein (1:5); 

 by wide ration one containing 8 to 10 times as much 

 carbohydrates as protein (1 : 10). 

 II. The same amount of digestible matter in narrow rations 

 produced from 11.8 to 12.9 per cent, more milk than 

 did a like amount of digestible matter in wide rations ; 

 narrow rations also reduced the cost of production 

 from 5 to 12 per cent. 



HI. The average cost of a quart of milk produced with the 

 narrow rations was 1.81 cents, and with the wide ra- 

 tions 1.97 cents. 



IV. The narrow rations produced over the wide rations practi- 

 cally the same relative increase in the amount of butter 

 and the same decrease in the cost of production as in 

 the case of the milk, 

 V. The narrow rations produced butter at a cost of 15.57 cents 

 per })ouud, and the wide rations at a cost of 16.52 

 cents per pound. 



VI. In Experiment I., with the narrow rations, the best cow 

 produced 12.2 pounds of butter in a week, at a cost 

 of 14 cents per pound ; and the poorest cow produced 

 8.26 pounds, at a cost of 19.37 cents per pound. In 

 the same experiment, with the wide ration, the best 

 cow produced 9.52 pounds, at a cost of 16.67 cents 

 per pound ; and the poorest cow produced 7.28 pounds, 

 at a cost of 18.88 cents per pound. 



