334 



LOUISE A. ANDERSON. 



TABLE III. 



TABLE SHOWING RESULTS OF LONG TIME EXPERIMENTS IN BOILED WELL WATER, 



pH RAISED TO 9.0 WITH NAOH. 



The pH never went below 8.6. Results expressed in cc. oxygen consumed 

 per gram of animals per hour. 



TABLE IV. 



TABLE SHOWING RESULTS OF LONG TIME EXPERIMENT IN ORDINARY WELL 



WATER DECANTED OFF PRECIPITATE. 



The pH was raised to 9.0 with NaOH. The pH never went below 8.6. Results 

 expressed in cc. oxygen consumed per gram of animals per hour. 



'50 

 '40 

 '3o 



120 



I 10 



1OO 

 00 



80 



12 34 567 8 9 10 u 12 13 14 



FIG. 2. Graph compiled from the data presented in Tables III. and IV. showing 

 the results of long exposures of worms to NaOH solution, pH 9.0-8.6. Per cent, 

 of increase or decrease, normal respiration being taken as 100, on the ordinate 

 and number of days on the abscissa. Heavy line represents experiment in ordinary 

 water and broken line experiment in boiled well water. The drop on the last day 

 in each experiment shows the drop in respiration from NaOH solution to watei. 



