SULPHUROUS ACID AND SULPHITES. 977 



CALORIES BALANCE. 

 INDIVIDUAL DATA. 



The extent of the combustion of the other elements of the food is 

 also of interest, and these data include not only the fat constituents, 

 but also all others in the foods capable of yielding heat on combus- 

 tion. These figures are also important from a dietetic point of view, 

 as they show the number of calories required by normal young men 

 when choosing a ration designed to keep them in a state of equilib- 

 rium. The number of calories in the food of No. 1 does not vary to 

 any extent in the three periods. There seems to be a tendency to 

 more complete combustion in the after period, when the calories in 

 the feces fall to 63, while at the same time they increase by a slight 

 amount in the urine. In both the feces and urine there are fewer 

 calories in the after period than in either of the other periods. 



The calories ingested in the food in the case of No. 2 do not greatly 

 differ in the three periods. There appears to be little effect in this 

 case produced by the added preservative upon the utilization of 

 calories. 



The number of calories in the food of No. 3 is not very constant, 

 being least in the fore period and greatest in the after period. There 

 is very little difference in the amount or percentage of calories uti- 

 lized and the balances remain practically the same. 



No. 4 received about the same number of calories a day in the 

 preservative and after periods and slightly less in the fore period. 

 There is little difference in the utilization of the calories between the 

 three periods and therefore no very great difference in the balances. 

 There is but little disturbance produced in this case in the utilization 

 of the food heat by the administration of the preservative. 



No. 5 will not be discussed, as the data are incomplete. 



In, the case of No. 6 it is seen that the number of calories in the 

 food is slightly increased in both the preservative period and in the 

 after period. The amounts appearing in the feces and urine are 

 considerably increased in the preservative period. There is, how- 

 ever, very little corresponding effect noticed upon the balances, which 

 remain practically constant. This disturbance in the amount of the 

 calories in the feces and urine with scarcely any variation of the 

 balances is explained by the different quantities of calories consumed 

 in the food. 



In the case of No. 7 the data are again incomplete and show no 

 notable changes such as could be ascribed to the use of the pre- 

 servative. 



For No. 8 the number of calories in the food remains almost con- 

 stant during the three periods. There is also practically no variation 



