OXYGEN CONSUMPTION IN THE PRESENCE OF CYANIDE. 413 



was observed in the degree of activity in normal and in cyanide- 

 containing water. 



The results with Helodrilus are presented in Table VII. and 

 with Lumbriculus in Table VIII. As these worms are rather 



TABLE VII. 



ACTION OF POTASSIUM CYANIDE ON THE OXYGEN CONSUMPTION OF 



Helodrilus tetcedra. 



TABLE VIII. 



ACTION OF POTASSIUM CYANIDE ON THE OXYGEN CONSUMPTION OF 



Lumbriculus inconstans. 



Oxygen Consumed, Cubic Centimeters -per Hour. 



small, a large number of individuals was used in each experi- 

 ment. The results are the same as in the case of the other 

 animals tested, a reversible decrease in oxygen intake when 

 cyanide is present. 



