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245 



As regards the possibility of an acceleration of the mobilization of the nitrogen- 

 ous compounds the matter is not fully investigated. In C an acceleration of the 

 normal process has been demonstrated (cfr. h 3), and the same result has been 

 found in E (h 3), but in all other cases I have not succeeded in producing an 

 acceleration of the mobilization by etherization; neither in the experiments F and 

 G has an acceleration been demonstrated ; in these experiments I have only carried 

 out analyses of the shoots: 



G. 



Seedlings 4 days old were used. Each portion contained 38 seedlings. 

 Weight of the portions before the exposure : 



1. 2. 3. 4. 



1410 gr. 1418 gr. 1416 gr. 1425 gr. 



Temp. 13 — 195° in the time of exposure. 



I. Directly crushed 



II. 3 days without ether 



III. 1 day with 0-02 c. c. ether. 2 days 

 without ether 



IV. 1 day with 0-07 c. c. ether. 2 days 

 without ether 



Absolute 

 amount 

 of ether 



0-6 c. c. 



2-1 - 



Total amount 

 of N 



17-32 mgr. 

 37-76 - 



35-86 — 



37-60 - 



After the exposure side-roots were indicated in all 3 portions; in II and IV all the seedlings 

 were fresh; in III a few of the seedlings were not fresh; tliis phenomenon must, however, not be 

 related to the effect of ether. 



All these results show that it is problematic whether an acceleration of the 

 mobilization of nitrogenous compounds can be affected in seedlings 4 — 8 days old, 

 as the small positive results obtained may be ascribed to the variability of the 

 material. We must, however, conclude that etherization can produce this effect in 

 quite young seedlings as I have found an increase of the formation of amides in 

 the experiments V and VI p. 22. For this corollary we must, however, presume 

 that also in quite young seedlings there is a correlation between the katabolism of 

 proteids and of the mobilization : and this presumption may hardly be contradicted. 



It must be mentioned here that alcohol of a strength of 96 per cent was 

 used for the extraction of the amides in experiment A contrary to the other experi- 

 ments for which was used alcohol of a degree of 55 per cent. To this circum- 

 stahce must be related the phenomenon that the percentages of amides found in 

 all instances of A are smaller than those of the other experiments. This fact 

 emphasizes, however, the parallelism betwe'en the metabolic processes and the mobi- 

 lization of the materials. 



D. K. D. Vldensk. Selsk. Skr 



