2 



RESPIRATION. 



[CH. I 



(2) Absorption of C0 2 by Potash. 



Take a filtering flask of 400 or 500 c.c. capacity, 

 having a lateral opening as shown in fig. 1, to which a 



FIG. 1. Exp. 2. 



glass tube, A (4 or 5 mm. bore), is attached by thick 

 rubber tubing and wire ties. The end of A dips into the 



