GEOLOGY. 227 



the various kinds of this limestone observed in divers parts 

 of Europe. There is an experiment which would, as we 

 conceive, place the matter beyond a doubt : this would be 

 an analysis of the limestone, with a view to ascertain the 

 quantity of magnesia w^hich it contains, and we regi'et much 

 that the loss of our specimens has deprived us of the oppor- 

 tunity of this analysis. But we think the case sufficiently 

 strong to justify us in considering this as the fonnation cor- 

 responding to the magnesian limestone of England, and to 

 the rauchwacke and zechstein of Thuringen. 



" The features which we observed from the Wassemon to 

 the Wisconsin are extremely interesting. At a distance offL 

 few miles northwest of the former stream, the vegeta,tip?^ 

 presented a sudden and striking change, announcing %,^^t 

 responding one in the geological character- of the |p.p^ntr.^. 

 We ascended a rough, steep, and hilly ground, wji,icj;). .-jv^;^ 

 covered with heavy timber, and with a very thick, jijinde^-j^ood^ 

 consisting principally of young oak and aspeu.: This .thi.plv 

 brushwood continued for about two miles, :wjl^n.\v^ ^^T^^pl^ 

 the bank of a small stream remarkable for. .tjia, .beauty of^^it^ 

 scenery, which differed from any that we.yji^d^.J^itl^^xXp^ ^^t 

 with. The brook runs in a deep and na^^r^pw.^leT^jrthj^.si.de^ 

 of which are very steep, and, in,,^om.^|,.pl^p^s,,,-V^rt,i9ak 

 They are covered, at their summi;t, wi,th-,;qL:;dei?.jSp y,^get^tiq:p, 

 which extends over the edge pf the rock, and irpparts, a 

 character of austerity and of glO)9flQ, tp^ ; jtl^gj Sjiclu.(Jed yalle^i 

 which finds not its parallel ij]..a.ny Xhpit-^Y^^^^gQlJeQt. pyer...tp 

 have seen.* The dark coloa:,whi(^l;i .^h^ ]^^tfx. Vej^^^iv^s fropi 



* This stream is an upper brancli'^of thV Pecfarron,'6n tts'ngnt 'bairiK', 

 about 8' south of lat. 43°. It may ndt Bis ^il^''6bfi!ipWhendefi Uy sotn^i of 



our readers, how a valley exceedina: all others in austerity and gloom could 



, ,, ^ , T). fiyl.jio-f.^iuo bnii /iuiiJijjj rjii! fo ;•f'^,Ti:rJ;■-.■l;^VJ;.' 

 be remarkable for the beauty of its scenery. We are quoting only the 



