712 T ho day. — On the Effect of Chloroform on 
Laurel, no inrush of oxygen accompanied disorganization ; on the contrary, 
the 0 2 intake diminished more than the C0 2 output, the ratio of the latter 
to the former rising to 2 -o. Similar results were obtained in other experi- 
ments in which a similar dose of chloroform was employed. 
Fig. 14. 
Experiment XIV. September 28, 1909. Dose, 0.5 c.c. or ten minutes. 
Temperature, 14-15 0 C. 
Here for the first three hours after chloroform, the 0 2 intake remained 
greater than the C0 2 output (Fig. 15 ), but this may be connected with the 
abnormally low respiratory coefficient during the hour preceding exposure 
ll. 
< 0 10 
Hi 
Q. 
n 
'"L_ 
2 4 © 8 10 12 /4 
HOURS AFTER CHLOROFORM 
Fig. 15. 
to chloroform. The depression after this large dose continued to a level 
still lower than in the previous experiments, and again the residual 0 2 
was less than the C0 2 output. 
Thus in the leaves of Tropaeolum , which contain no tannin, the absorp- 
tion of oxygen is affected by strong doses as well as weak in a similar way 
to the production of C0 2 , and there is no such marked absorption of oxygen 
after strong doses as occurs in the other kinds of leaves. 
The temporary augmentation of the respiration produced by small 
