131] 



THE GOLDFISH AS A TEST ANIMAL— POWERS 



11 



Minutes 

 2040 



1920 

 1800 

 1680 

 1560 

 1440 

 1320 

 1200 

 1080 



960 

 840 

 720 

 600 

 480 

 360 

 240 

 120 



Minutes 

 1200 



1080 

 960 

 840 

 720 

 600 



480 

 360 

 240 

 120 



100 



t 



10 



0.05. 0.1. 0.15. 0.2. 0.25. 0.3 0.35 0.4. 0.45. 0.5. 0.55N. 



Figure 3. Potassium chloride 



100 



t 



0.5. 0.1. 0.15. 0.2. 0.25. 0.3. 0.35. 0.4. 0.45. 0.5. 0.55. 0.6. 0.65. 0.7. 0.75. 0.8N. 



Figure 2. Sodium chloride 



the goldfish does not increase in the same ratio as the concentration 

 of the lithium chloride decreases, i. e,, the survival time of the the gold- 

 fish is not in inverse proportion to the concentration of the lithium chlo- 

 ride employed. At higher concentrations (0.466, 0.388, and 0.322 N.) the 

 increase in survival time of the goldfish was less rapid than the decrease 

 in concentration of the solution. With concentrations from 0.322 to 0.133 N. 

 there was a more rapid increase in survival time of the goldfish in proportion 

 to the decrease in concentration of the solutions. And finally with concen- 



