]S^£w York Agriculturai. Experiment Station, 107 



that made by Lot XIV and the gain made by Lot XVI was 

 about 1 per ct. greater than that made by Lot XV. The amount 

 of dry matter in the food consumed for each pound gain in 

 weight was 4.4 pounds for Lot XI and 3.8 pounds for Lot XII; 

 the amount was 4.7 pounds for Lot XIII and 4.5 pounds for 

 Lot XIV. It was 5.8 pounds for Lot XV and 5.0 pounds for 

 Lot XVI. The figures show that while the rapidity of growth 

 was about the same under both rations, the vegetable-food ration 

 was used more efficiently by the growing chicks. A smaller' 

 amount of food was required to produce results equal to those 

 produced by a much larger amount under the ration containing 

 animal food. 



The difference in the cost of food was due not so much to the 

 somewhat greater consumption under the one ration, but more 

 to the difference in cost of the two mixtures which constituted 

 half the food in the respective rations. The difference in the 

 food cost of the gain made is therefore due not alone to the some- 

 what greater efficiency of the one ration but more to the valua- 

 tion of the different foods necessarily used. 



The food cost of each pound gain in weight made by Lot XI 

 was 5.3 cents and of that made by Lot XII 4.2 cents. For Lot 

 XIII the cost was 5.6 cents and for Lot XIV 4.9 cents. For 

 Lot XV the cost was 7.0 cents per pound and for Lot XVI 5.4 

 cents per pound. In rapidity of growth there was little practi- 

 cal difference, equal weights being reached by contrasted lots at 

 the same age. While at ten weeks of age equal weights had 

 been attained by contrasted lots, at twelve weeks the average for 

 Lot XIII was slightly heavier than that of Lot XIV. The 

 weights of other lots at twelve weeks still bore the same relation. 



EXrEIUMENT WITH DUCKLINGS, SECOND SERIES. 



Of the two lots of Pekin ducklings, Lot C was fed the ration 

 containing animal food and Lot D the vegetable food ration with 

 the bone ash. In the accompanying tables the data in regard to 

 the feeding are given up to the age of ten weeks. After ten 



