54 Report of Department of Animal Husbandry of the 



oyster shell to lot XVII, one ounce of Florida rock to lot XVIII and 

 one ounce of a mixture of equal parts of bone ash and oyster shell to 

 lot XIX. 



RESULTS FOR EACH GROUP. 



GROUP A. 



The grains and blood meal fed to lots I and II gave a ration rather 

 low in mineral matter. About 2 per ct. of the total dry matter was 

 ash during the first four weeks. It was somewhat more afterward. 

 The average for the whole time was about 2.2 per ct. With the 

 addition of Florida rock the amount of mineral matter was 10.3 per 

 ct. of the total dry matter in the food for lot I. 



About 30 per ct. of the protein in the ration came from animal 

 food. This percentage was slightly higher during the first four weeks 

 than afterward. On the average for the ten weeks lot I made a pound 

 gain in weight for every 2.^ pounds of dry matter in the food, exclu- 

 sive of Florida rock; and lot II one pound gain for every 3.0 pounds 

 of dry matter. The cost of food, including that of rock, (the rock 

 cost about 22 per ct. as much as the animal food) per pound gain 

 was 3.7 cents for lot I and 4.1 cents for lot II. The average weight 

 attained was greater for lot I. 



GROUP B. 



The ration, similar to that for group A, fed to lots III and IV sup- 

 plied ash constituents amounting to 2.1 per ct. of the total dry matter 

 during the first four weeks and about 2.4 per ct. afterward. Nearly 

 30 per ct. of the protein was derived from animal food. 



The total mineral matter with addition of the ground rock formed 

 10. 1 per ct. of the dry matter in the food, and with addition of 

 ground shell 4.6 per ct. The smaller amount of ground oyster shell 

 was used to avoid the ill effects which usually followed the feeding 

 of a large amount. 



The amount of dry matter in the food, exclusive of the added 

 mineral matter, for each pound gain in weight was 3.6 pounds 



