From the data obtained with this dog the following computation may be made, which shows that the sum of the individual increases of heat production caused by each substance is only a little more than the total heat production when all the substances are given together:

Calories. Per Cent.

Glycocoll, 20 grams..........................

4.9

25

Glucose, 70 grams...........................

6.9

30

Fat, 75 grams..............................

3.9

17

Sum of all ..........................

15.7

72

Glycocoll, 20 gm. + glucose, 50 gm., 4 hrs. after fat, 75 gm..............................

14.6

64