500 MYRRH PAREIRA BRAVA. 



1875. To your learned paper on Pareira Brava I allow myself to 



add the remark, that in the year 1864 Winckeler, in my New 

 Repertorium for Pharmacy, xiii. 49, 200, described a root, which 

 had appeared in Frankfort commerce, in which root he found 

 a considerable quantity of cissampolin or pelosin and also the 

 same alkaloid which is contained in the trunk of Pareira 

 Brava. By my inducement Dr. Eichler, then assistant with 

 Martius, now Professor of Botany at Kiel, histologically 

 examined this root, and he convinced himself that it has 

 exactly the same form as the Menispermaceae, that it is in 

 every respect extremely like the thinner pieces of the Eadix 

 Partirse Brava3 of trade, if not identical with it and in any case 

 is derived from one of the Cissampelos kind. 



"Accept my best thanks and the assurance of my highest 

 esteem. 



" Yours very obediently, 



"L. A. BUCHNER." 



