lie acid. I never saw oxalic acid (as oxalate of lime) and 

 alcaloid in the same cell. 



Generally speaking the alcaloid is clissolved in the cellsap 

 in young organs oiz: leafstalks, leafparenchyma near the gro- 

 wing points, young bark; as an amorphous solid in the old 

 parts like the cells of the secondary bark. 



Frequently it is présent as a tannate, wether occasio- 

 naly as an other sait lias not been investigated. 



Besides in the bark, much alcaloid is présent in very 

 young organs, near the stem-growing point, young but not 

 too young leaves etc. 



Very active organs undergoing many and rapici divi- 

 sions apparently contain no alcaloid, f. e. it is not found in 

 the very active part of the stem-growing point, in the cam- 

 bium, in the active part of the root-tip. 



Quite close to the stem-growing point considérable more 

 alcaloid is found than quite close to the rootgrowing point. 



Part II. Where is the alcaloid formed ? 



As is well known ail the starch présent in the bark of 

 trees is formed in the leaves and transportée! towards 

 the bark in small quantifies. The albuminous substances 

 also, most probably at least, are formed in the leaves. 

 Where the leaves are the originators of such important 

 substances it was highly suggestive to investigate wether 

 they formed the alcaloid also. The published chemical ana- 

 lyses gave much cause to inquire into a possible alcaloid- 

 forming property of the leaves in as much as the results of 

 thèse analyses are so différent that a great inconstancy in 

 the quantity of alcaloid présent seems to exist. It was 

 consequently to expect that tins inconstancy of the leaves 

 in regard to the quantity of alcaloid présent would be due 

 to a temporary transportation of alcaloid towards the stem. 



