126 STORRS AGRICULTURAL EXPERIMENT STATION. 
multiplied by 6.25. Hence dividing the protein by 6.25 and multiplying the 
quotient by 2.143 gives the equivalent urea. Assuming that all of the digested 
protein is excreted as urea, the number of grams of urea multiplied by 2.53, the 
fuel value of one gram of urea, gives the total fuel value of the urea equivalent to 
the digested protein. But (protein divided by 6.25) X 2.143 X 2.53 =protein X 
.87. This last expression, protein X .87, therefore, represents the fuel value of 
the urea equivalent to the digestible protein. The fuel values of urea equivalent 
to the protein in this experiment and the total unused fuel value (the sum of the 
fuel values of the feces and of the urea equivalent to the protein) are as follows: 
fuel Values of Urea Equivalent to Digested Protein. 
Sheep B, - - - - - - - - - 215 Calories. 
Sheep D, - - - - - - - - - 280 Calories. 
Total Unused Fuel Value (Feces Plus Urea Equivalent), 
sheep Bree ~ - - - - - - - 7,815 Calories. 
Sheep J, - = - - - ~ i = - 6,200 Calories. 
The available fuel value of the digested nutrients is the difference between the 
fuel value of the total food eaten and the total unused fuel value. Omitting 
details of calculations the results follow. With these results are given for the 
sake of comparison those obtained by taking the grams of nutrients digested as 
stated on page 110, and multiplying the protein by 5.5, the meme by 4.1 
and the fats by 9.3 Calories. 
Available Fuel Value of Digested Nutrients. 



| 
| As Galeaiuved from | As Determined by 





Analysis. Bomb Calorimeter, 
SHEED br. = = - - - as 10,625 Calories. | 10,615 Calories. 
BREED. I), oo. = - - < - 12,050 Calories. | 12,230 Calories. 

Dividing the fuel value of the digested nutrients by the fuel value of the food 
eaten gives the per cent.-of total fuel value which thus becomes available. 
These percentages follow. With them are the percentages of digestible protein, 
taken from the Report of this experiment on page IIo. 
Digested Protein and Available Fuel Value of Food Eaten. 
Sheep B, 48.0 per cent. of total protein and 57.6 per cent. of total fuel value. 
Sheep D, 62.1 per cent. of total protein and 66.4 per cent. of total fuel value. 
DIGESTION EXPERIMENT NO. 2. 
(See page 111, this Report.) 
Wheat bran, corn meal, linseed meal, oat and pea meal, and hay. 
Calories per Gram of Water-free Substance. 



Laboratory As Calculated from | As Determined by 

O. Analysis. Bomb Caloriinere 
Wheat bran, - - - 1304, 4.405 4.585 
Linseed meal, - : - 1302 4.690 4.735 
Oat and pea meal, | 1303. | 4.470 4.530 
Hay, - s - < 1426 4.255 | 4.505 



