143] 



THE GOLDFISH AS A TEST ANIMAL— POWERS 



23 



Minutes 

 1200 



1080 



960 



840 

 720 

 600 



480 

 360 

 240 

 120 



0.05. 0.1. 0.15. 0.2. 0.25. 0.3. 0.35. 0.4. 0.45. 



Figure 12. Magnesium nitrate 



100 



t 



10 



9 



8 



7 



6 



5 



4 



3 



2 



1 



,5N. 



Magnesium Nitrate. 



TABLE XIII 

 Temperature 21°C. December 15 and 16, 1916 



