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during the ensuing period, especially as a comparison between the experiments 

 separately is not possible the experiments having been carried out al different times; 

 consequently the seedlings have been exposed to different conditions especially 

 with regard to temperatures. This circumstance has caused the phenomenon 

 found in IV 1, which states a more intensive formation of sugar than in VII 1 in 

 spite of the seedlings of the former named portion being I day younger than those 

 of the latter portion. The same phenomenon may be seen with regard to the 

 amides. The considerable acceleration of sugar-formation, shown in III 3, is surely 

 not directly caused by the etherization, but must be regarded as the beginning of 

 destruction owing to the death of the plant, a phenomenon which was also pointed 

 out in the analyses of the nitrogenous compounds. 



Comparing these results with the non-corrected ones of the entire amounts of 

 sugar, we find a considerable difference in those cases, where large and average 

 doses are used, while the difference proves to be slight, when small doses are 

 employed. This circumstance shows clearly that large doses affect the respiratory 

 process considerably more than the sugar-forming process. As an accumulation of 

 hexoses is not observed, these products having been consumed by the respiratory 

 process and possibly too by the synthesis of di- respective tri-saccharides, we 

 cannot ascertain by these experiments, whether the COj- production is retarded 

 entirely by the narcosis, or further by lack of hexoses; the latter alternative is 

 however supported by the fact that a retardation of the inversion of sugar, pro- 

 duced by the narcosis, has been observed in all cases. 



CHAPTER IV. 



Experiments on the Translocation of the Nitrogenous Substances in Seedlings. 



It has previouslj' been mentioned how etherization acts upon the nitrogenous 

 substances in young seedlings collectively. In this chapter we shall examine how 

 the various parts i. e. the root and the shoot (in the following called "shoot" for 

 short) respectively the cotyledons react upon the narcotization, these two regions 

 acting quite differently: the one part, the shoot, being in full development and 

 growth, while the other part is destined to die in consequence of a constant stream 

 of food-materials going from the cotyledons to the young growing shoot. On this 

 subject Zaleski has made a few experiments, the results of which, however, are 

 hardly correct. The experiments were arranged in the following way: Young seedlings 

 of Lupinus angustifolius (unfortunately their age is not indicated), germinated in 

 darkness in pure sand, were divided into 6 similar portions. The first portion was 

 immediately examined, the cotyledons and the shoots being examined separately; 

 the other portions were similarly treated after the exposure. The plants of the 



n. K. 1) Vidensk. SelsU. Skr.. 7. Kiekke, n:iturvitlensk. ok jinithcm. Afd. VI. 6. 31 



