Botany. — "A method of simultaneonsly studyini/ the absorption 

 of 0, and the discharge of CO, in respiration:' By D. S. 

 Fernandes. (Communicated by Prof. F. A. F. C. Went.) 



(Communicated at the meeting of May 26, 1923). 



le 



Before entering into details, writer will briefly indicate, liow tl 

 apparatus works and what precavitions should be laken, illustrated 

 by a simple diagram, (lig. I). 



Fig. 1. 



From p, a rubber sucking- and forcing pump, the air is pumped 

 as the arrows indicate. The air enteis the respiratory vessel v at 

 the top, leaves it at the bottom and is dried in the wash-tlask (/,, 

 which contains concentrated sulfuric acid. From d, passing through 



