SULPHUROUS ACID AND SULPHITES. 



979 



on the part of the preservative to interfere with the absorption of the 

 heat-producing substances, resulting in an increased excretion of calo- 

 ries, and this tendency is somewhat increased in the after period. No 

 notable difference can be seen between the two summaries except the 

 diminution of the calories in the feces of Nos. 1 to 6 in the after period, 

 and their increase in the urine in the preservative period. In general 

 it may be said that no marked influence is exerted upon the utilization 

 of heat and energy of the food by reason of the administration of the 

 preservative. The tendency indicated, however, points to a decreased 

 absorption of food elements, as already stated. 



TABLE XIX. Calories balances for Series VII. 

 [Averages are per day.] 



11240 Bull. 84, pt 307 15 



