PREFACE 5 



therefore designedly omitted to speak at length of 

 matters in which I have been able to bring forward 

 little or nothing that was new. What I saw daily and 

 oftenest was trees ; and what observations I made 

 under that head I could the more aptly suppress in my 

 travels, the recently issued work of my esteemed friend 

 Head-Forester von Wangenheim of Tilsit in Curland 

 containing everything on that subject which can be of 

 use to the European reader. 



Of certain other subjects which lay nearer the pur- 

 pose of my journey, I have already given account, in 

 the Verzeichnis der nordamerikanischen Heilmittel, 

 (for which I had opportunity on this journey to as- 

 semble much important information), and in the Bey- 

 trage zur mineralogischen Kenntnis des ostlichen 

 Theils von Nordamerika. As confirmation of the de- 

 scription given in these contributions, of the American 

 mountains lying to the south of the Hudson river, I 

 have been pleased to find in the G fitting. Anzeigen 

 (Art. 176, 1787) a notice of Mr. Belknap's description 

 of the White Mountains in New Hampshire, (inserted 

 in the 2nd volume of the Transact, of the Americ. 

 Society at Philadelphia) ; this exactly fits with my own, 

 and confirms my suppositions regarding the continued, 

 regular, uniform course of the mountains through those 

 regions not visited by me. 



In the item of fishes, what I had leisure and oppor- 

 tunity to observe in the North American waters, partly 

 on this journey and partly before, will be given in a 

 separate treatise, to appear in the Schrift. der Berliner 

 Gesellschaft Naturforschender Freunde. 



