172 



Figure 4 is a photograph of the apparatus used by Detmer' for 

 estimating the amount of CO. produced by plants, and including also 

 the titrating apparatus for measuring used by him. The apparatus as 

 shown in Fig. 4 is given only to demonstrate an improved form of 



Maximows' automatic pipette, which may advantageously be used in 

 connection with the Detmer apparatus. 



If one opens the pinch cock A (Fig. 4), the baryta water in B, 

 freed from the CO;: by the soda lime in C, flows into the burette D as 

 shown by Detmer and the air in D escaping through E. If now one 



* Detmer, W. — Pi-actical Plant Physiolotry. Translation by S. A. Moor. pp. 264 

 and 267. 



