﻿236 



24 



Total 

 amount 

 of etiler 



Before 

 the inversion 



After 

 the inversion 



Before 



the 



inversion 



Aner 

 the inversio 



VI. 



VII. 



The tables slate tlie amounts of sugar per 10 grams of the objects (the sugar is 

 estimated as dextrose). As remarked by Johannsen [Johannsen 1897, p. 37] it is 

 however necessary to consider the amounts of carbohydrates, evolved as CO2 by 

 the plants in order to obtain an idea of the processes passing within the group of 

 carbohydrates; consequently I have introduced a correction in Johannsen 's method 

 supposing the CO.,, evolved by the respiratory process, to be chiefly produced by 

 hexoses. The corrected amounts are marked "corr." in the tables. The corrected 

 numbers of llie whole amount of sugar, which represent the rapidity of the forma- 

 tion of sugar, show in VI 4 and in VII 2 an acceleration of the formation of sugar 

 caused by small and average doses of short duration. The same doses of a some- 

 what longer duration have produced a retardation of the formation of sugar which 

 takes place normally in the seedlings (cfr. Ill 2, IV 2, 3 and V 3). Large doses of 

 short duration have also aflected a retardation of the process (cfr. VII 3). That the 

 dose used in VI 3 has produced no influence on the formation of sugar, must be 

 owing lo the circumstance that the dose was too small to produce any effect 

 so long after. If the plants were analyzed directly after the exposure, it is pos- 

 sible that we might have found a small positive result. These experiments are 

 however too few to demonstrate the effects separately during the narcosis and 



