32 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[152 



0.2. 0.4. 0.6. 0.8. 1.0. 1.2. 1.4. 1.6. 1.8. 2.0. 2.2. lAg. 



Figure 18. Caffeine. Velocity of fatality curve only. Abscissa represents g. per liter 



100 



t 

 12 



11 



Ij 



9 



8 



7 



6 



5 



4 



2 

 1 



0.25. 0.5. 0.75. 1.0. 1.25. l.S«. 1.75. 2.0. 2.25. 2.5. 2.75. 3.0. 3.25. 3.5. 3.75. 4.0g. 



Figure 19. Phenol. Velocity of fatality curve only. Abscissa represents g. per liter. 



