153] 



THE GOLDFISH AS A TEST ANIMAL— POWERS 



33 



100 

 t 



4 

 3 

 2 



2. 4. 8. 10. 12cc. 

 Figure 20. Pyridine. Velocity of fatality curve only. Abscissa represents cc. per liter 



TABLE XXIII 

 Pyridine. Temperature 17.5°C. 



