BORIC ACID AND BORAX. 



101 



Combining the three expressions of Series V into one, we find a 

 slight loss of weight during the preservative period and an additional 

 slightly greater loss of weight during the after period. 



It now remains to combine into a single expression the average 

 weights, by periods, for all the series. The length of the line for each 

 period merely approximates the usual length of that period. 



FIG. 6. Daily and average body weights for Series V. 



Studying now the expressions as a whole for Series I, III, IV, and V 

 (fig. 7) it is seen that there is a loss of weight amounting to about 500 

 grams during the preservative periods and an additional loss of weight 

 amounting to about 400 grams for the after periods. The evidence, 

 therefore, which is thus accumulated throughout the whole series of 



FIG. 7. General- average of body weights for entire experiment, including Series I, III, IV, and V. 



observations appears reasonably convincing and shows that the use of 

 borax and boric acid in the quantities and in the manner described 

 tends to produce a slight decrease in the weight of the body. This 

 tendency to decrease is also a continuing one, in so far as the period of 



