98 



INFLUENCE OF FOOD PRESERVATIVES ON HEALTH. 



Studying now the individual data of Series I (fig. 2) it is seen at once 

 that there is a slight decrease in the weight of No. 1 during the pre- 

 servative period, while during the after period the increase in weight 

 is almost exactly equivalent to the loss during the preservative period, 

 so that the mean weight for the after period is the same as that for the 

 fore period. 



In the case of No. 2 there is a loss of almost a kilogram in weight 

 during the preservative period, and an additional loss of about 200 

 grams during the after period. 



In the case of No. 3 a marked loss is shown during the preservative 

 period, which is partly regained during the after period. 



In the case of No. 4 there is a progressive loss from the fore period 

 to the after period, inclusive. 



In the case of No. 5 we have the exact reversal of the data for No. 4. 

 There is in this case a progressive gain. A later investigation showed 



FIG. 3. Daily and average body weights for Series II. 



that No. 5 was probably not receiving full and nutritious rations at the 

 beginning of the experimental work. He lived in somewhat restricted 

 surroundings and apparently without the abundant supplies of food 

 which are usually found at the disposal of young men. This fact in 

 the invironment is an important one in the consideration of this pro- 

 gressive increase in weight in his case. 



In the case of No. 6 there is a progressive loss of weight extending 

 through the whole series. 



Collecting all the expressions of Series I into a common graphic 

 representation it is seen that there is a considerable loss of weight 

 attending the administration of the preservative, and that .this loss is 

 partly restored during the after period. If we should exclude, how- 

 ever, the data of No. 5 it is evident that there would still have been 

 a loss of weight during the after period. 



