New York AGRICULTURAL EXPERIMENT STATION. 41 
For the first three weeks for Lot III 38.5 per ct. of the dry 
matter and 59.4 per ect. of the total protein came from animal 
food. The ash represented 24.5 per ct. of the dry matter. For 
the following seven weeks 38.4 per ct. of the dry matter and 60.0 
per ct. of the total protein came from animal food. The ash 
constituted 25.8 per ct. of the dry matter. 
For the first three weeks for Lot IV 57 per ct. of the dry mat- 
ter in the ration came from animal food which supplied 794 
per ct. of the total protein. The ash made up 26.2 per ct. of the 
dry matter. For the following seven weeks 61.5 per ct. of the 
dry matter and 78.9 per ct. of the protein came from animal food. 
The ash constituents formed 25.7 per ct. of the dry matter. 
The rations were all narrower in nutritive ratio than is neces- 
sary. Differences between them in this respect were not great, 
nor as much as would exist in other respects if widened to any 
extent with foods available, giving for some an undesirable pro- 
portion of fat. 
RESULTS WITH EACH LOT. 
The ducklings in Lot I having the “20 per ct. ration,” (one 
in which about 20 per ct. of the protein was derived from animal 
food) during the first three weeks made an average gain in 
weight of 15.9 ounces, at the rate of one pound for every 2.5 
pounds of dry matter in the food—and at a food cost of 3.6 cents 
per pound gain. During the remaining seven weeks the average 
gain was 55.8 ounces, one pound for every 4.2 pounds of dry 
matter in the food, at a cost of 6.0 cents per pound gain. For 
the first seven weeks of feeding, up to the age of eight weeks, 
the average gain in weight was. 56.3 ounces, one pound for 
every 3.0 pounds dry matter in the food, the food cost being 
4.2 cents per pound gain. For the entire period covered by the 
experiment the total average gain was 71.7 ounces, at the rate 
of one pound for every 3.9 pounds of dry matter in the food. 
The food cost 5.4 cents per pound gain. 
The ducklings in Lot II having the ‘40 per ct. ration,’ made 
an average gain of 19.1 ounces during the first three weeks, at 
the rate of one pound for every 2.2 pounds of dry matter in the 
food; the cost being 3.3 cents per pound gain. For the follow- 
ing seven weeks the average gain was 59.7 ounces, one pound 
for every 4.6 pounds dry matter in the food and at a food cost 
