34 



While at the end of a clear day the following was found: 

 Oct. 3. 6. p. m. 

 361 exceedingly large quantity 

 362 



363 „ 



364 „ „ 



365 „ „ „ 



366 traces 



367 „ 



368 exceedingly „ 



369 pretty much 



370 „ 



By which we may conciliée that climatological influences' 

 are felt in the formation of the alcaloid. 



We hâve thus seen that Cinchona leaves at one time 

 do contain alcaloid while at another they do not, the' 

 question is now what becomes of tins alcaloid, is it 

 transported towards the stem or is it used by the leaves 

 themselves? 



To décide tins experiments with eut leaves are 

 necessary. 



When the leaf itself uses the alcaloid, it should disap- 

 pear under favorable circumstances inside of a compara- 

 tively short time. We will see that such does not happen 1 

 as becomes clear on perusal of the following tables. 



In the first place the influence of darkness was studied. 



As is seen from a look at Taljula I, no effect whatever 

 was caused by it. 



An addition of glucose to the water, could not induce 

 the leaves to part with their alcaloid (T. I) 



A sejourn in the light, be it with the leafstalk immer- 

 sed in water, or the whole leaf placed on moist blotting 

 paper inside of a Pétri -dish did not lead to the using up 

 <# the alcaloid (c. T. IL). 



