30 



transportée! towards the stem every day, or in a year 

 nearly 2 KG. 



As we know such quantifies of alcaloic! are never acu- 

 mulatec! in the bark. 



We have thus corne to the following conclusion: 



The quantity of alcaloid présent in the leaves of a C. S. 

 and of a G. L. is, provided it can be transported towards 

 the stem every day, many Urnes sufficient to account for the 

 quantity of alcaloid fôund in the bark or in other words 

 the leaves would be able to for m this quantity of alcaloid. 



It is now askec! is a leaf of C. S. able to transport 

 towards the stem inside of 24 hours the quantity of alcaloid 

 présent in it? 



From my séries of experiments I quote the following: 



m. Sept. 



18. 



1899 



6 a. m. Sept. 19. 1899 



284 



Ml 





. emptv 



285 - 



» ■ 





77 



286 







77 



287 







77 



288 



n ■ 





■ ' 77 



289 



H • 





7? 



291 



77 ' 





77 



292 



11 ■ 





7' 



m. Sept. 



21. 



99 



6 p. m. Sept. 21. 99 



305 



full 





empty 



308 



7? ' 





77 



310 



n 





77 



Or, lea/oes of C. S. are able to get rid of ail their alcaloid 

 inside of twelve hours. 



We have allready seen that a treeof C. L. with 10.000 

 leaves would be able to form in this way 2 KG. of alca- 

 loid a year. Why don't we find that then? 



Several reasons can cause this: f. e. changing of the al- 

 caloid to another substance, but one of the reasons is that 



