QjQ JOURNEY TO THE SUMMIT OF MONT-PERDU. 



The above conftitutes the whole of this fimple and effec-. 

 tuai contrivance, and its mode of operation fcarcely needs 

 to be defcribed. Asthe (leam becomes flronger it ralfes the 

 yalve, and efcapes through D, and raifes the weight H 

 higher the more the preflure within exceeds that of the 

 working fteam in the upper fpace F E. 



Journey to the Summit of Mont-Perdu. By Cit. Ramond *. 



SaufTure's tra- ^ HEmanyexcellentobfervations made bythecelebratedSauf- 

 vcis in the Alps furein the Alps, traverfing that grand ademblage of mountains irj 

 highly ufefiil to ,,,. _. V . -t . J ir a if . .1 j 



geology. all directions, have contributed more etiectually to the advance- 



ment of geology, than all the hypothefes that have been formed, 

 Ratnond's In tjie Cit. Ramond is rendering a fimilar fervice to the fcience, by 

 I'yienees. ^j^ repeated journies in the Pyrenees; and his adventurous re- 



fea;;ches will foon bring us acquainted with a great part of tha;t 

 chain, the ll^uflure of which is fo different from <hat of the 

 Alps. In a work publiflied two years ago, he defcribed the 

 baiis of Mont-Perdu : he had even approached its furnrait, and 

 had obferved that this mountain, the loftieft of the Pyrenees, 

 was calcareous, and coi^aincd ft^ells and other organized 

 bodies, in a foffil itate, at an elevation of about 3600 metres. 

 Reached the -^'^ ^^" journey he made in Aiig^ift 1802, he reached the 



fummit of Mont fummit of (.he mountain by pafllng the Col de Fanlo, or Nifcle. 

 V^'^tkat ftrata ^" ^'''*' "^"^^ ^° contlantly found flrata of corapad carbonated 

 of carbonated lime in a pofition nearly vertical. They include flrata of cal- 

 I'f ^■' 1 r careous fandftone, and thefe ftrata fometimes cover the falient 



Horizontal ot -in' i • , • i i- r^• 



calcareous fand- angles ot the. vertical ftrata, nearly in a horizontal direction. 



^o'^e* This calcareous flone falls off fpontaneoufly in little irregular 



fragments: on the flighteft fridion it emits a naufeous fetid 

 fmell. Some of the flrata of this flone contain nodules of flint ; 

 others fuch confiderable mafles of camerines, that the flone ap- 



Summit a fetid pears entirely compofed of them. The fummit is formed of a 



hmellonc. i'etid lirae-ftone, contaminated with quartz, and containing a 



little iron, and -jj^ of carbon, without alumine. Cit. Ramond 

 found no fragnietits of flieils: but this fione b.eing of a fimilai^ 



' * Bulletin des Sciences. 



Icind 



