Trimble— Mangrove Tan u in. 55 



nut-tannin, with which rhatania-tannin, according to Gra- 

 bowski, and tormentil-tannin, according to Rembold, closely 

 agree. 



The conclusion naturally reached by this investigation is 

 that we have in mangrove a tannin which is identical with 

 those from horsechestnut, rhatany and tormentil, and pos- 

 sibly also with that from mimosa or wattle bark. 



Philadelphia, 1892. 



