936 INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



including the sulphur as preservative, is 0.044 gram, and in the 

 after period the balance is again positive, with a magnitude of 0.061 

 gram. 



No. 2 shows similar conditions. The sulphur in the food remains 

 almost constant during the three periods. Likewise the amount 

 excreted in the feces is practically constant in the three periods. The 

 excretion in the urine is very largely increased in the preservative 

 period and diminished very slightly from the fore period in the after 

 period. Practically the whole of the added sulphur appears in the 

 urine. The balance in the fore period is positive and its magnitude 

 is 0.014 gram; in the preservative period the first balance is negative 

 and its magnitude is 0.206 gram; the second balance is positive, 

 amounting to 0.043. In the after period the balance is again positive 

 and its magnitude is 0.09 gram. Unlike the case of No. 1, there 

 appears to be a retention of sulphur in the preservative period. 



In the case of No. 3 the quantity of sulphur administered in the 

 food is quite constant, being slightly greater in the after period. The 

 amount excreted in the feces is almost the same for the fore and after 

 periods, but is considerably increased in the preservative period, 

 showing in this instance an excretion in the feces of a part of the 

 sulphur added as sulphites, or a less complete absorption of the sul- 

 phur of the foods. A great increase of the excretion of sulphur in 

 the urine is found in the preservative period. The balance in the 

 fore period is positive and its magnitude is 0.109 gram; in the pre- 

 servative period the first balance is negative and its magnitude is 

 0.243 gram; the second balance is positive, amounting to 0.006. It is 

 again positive in the after period and its magnitude is 0.166 gram. 

 There appears to be no marked effect produced on the sulphur metabo- 

 lism in this case. 



In the case of No. 4 the amount of sulphur in the food is practically 

 the same for the fore and preservative periods and slightly increased 

 in the after period. The amount of sulphur eliminated in the feces 

 is almost the same for the three periods. The elimination in the 

 urine is largely increased in the preservative period. The balance in 

 the fore period is an abnormal one that is, it is negative, although its 

 magnitude is very small, amounting to 0.079 gram. The first balance 

 in the preservative period is strongly negative, its magnitude being 

 0.379 gram; the second balance is also negative, but amounts only to 

 0.064 gram, accounted for by the increased katabolism of sulphur. 

 The balance is also negative in the after period, its magnitude being 

 0.06 gram. 



Comparison of the data of No. 5 is unsatisfactory because of the 

 ii regularity in the fore period. The data show again an increase in 

 the sulphur eliminated in the urine in the preservative period. There 

 is a positive balance in the fore period of 0.181 gram daily, a nega- 



