The Evolution of Oxyj^en. 



lOl 



Table XXVI, 

 Assimilatory Coefficient for Succulents (Aubert). 



Recently Maquenne and Demoussy (1913) iiave calledin question 

 Bonnier and Mangin's results. As with all other workers on this 

 subject, these investigators used a closed vessel as plant chamber 

 connected to a reservoir containing 8 or 10 parts of carbon dioxide 

 to 100 of air, from which the leaf chamber was filled after 

 evacuation. 



The leaf chamber was exposed to light and after a convenient 

 time the gas in the chamber was analysed. 



The respiratory and assimilatory coefficients of a large number 

 of species were measured ; the results are given in the following 

 table. 



Table XXVII. 

 Respiratory and Assimilatory Coefficients (Maquenne and Demoussy ). 



