143] 



THE GOLDFISH AS A TEST ANIMAL— POWERS 



23 



Minutes 

 1200 



1080 



960 



840 



720 



600 



480 



360 



240 



120 



100 



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



Figure 12. Magnesium nitrate 



TABLE XIII 



Magnesium Nitrate. Temperature 21°C. December 15 and 16, 1916 



