252 



The peaks on 

 the two fulcs 

 rife in oppofite 

 diredlJons, 



Limits of per- 

 manent fnow, 

 and of vegeta- 

 tion. 



HEMP MADE TO RESEMBLE COTTON. 



On approaching the peaks that rife from this flat, the ftrata, 

 which are of compa6l (belly limellonCj rife at an angle of 45®, 

 but in a dire<5tion contrary to that of the ftrata that form the 

 fniall peaks on the northern, or French fide. Thus thefe flrata 

 as they rife diverge hke the flicks of an opened fan, the vertical 

 ones conftitule the fummits ; a remarkable arrangement, which 

 Cit. Ramond afcribes to a Aiding of the ftrata, rather than a 

 rifing up, properly fo called, from a depreffion of the other 

 end. 



Cit. Ramond has afcertained the limits of permanent fnow, 

 and of vegetation, for this lofty part of the Pyrenean chain. 



The fnow terminates at 2440 metres. The laft trees are 

 Scotch firs, which reach 2150 metres. Next come the (lirubs, 

 of which the juniper is the higheil. At 27GO tnetresare found 

 the rariunculus parnojjicc-folius, the faxifraga Groenlandica, &c. 

 then the arteniifia rupeftris of Lamarck ; and laftly, round the 

 very peak of Mont-Perdu, on rocks too floping to retain the 

 fnow, grow the cerafiium, perhaps the alpinum of Linneus, 

 and the rofe-flowering aretia alpina. 



The author's 

 torn>er experi- 



Subfequent at- 

 tempts. 



XI. 



Notice of a Method of giving the Appearance of Cotton to Hemp 

 or Flax*. B^ Cit. Berthollzt. 



W HILE I was engaged in the application of the oxige- 

 nated muriatic acid, to the art of bleaching, I made experi- 

 ments on flax, and I inferted this obfervation in the firfl: 

 volume oi Elemens dc Tainture, p. 258. " I have endeavoured 

 to bleach flax completely, by the method I make ufe of with 

 thread ; but although its filaments may not lofe much of their 

 folidity by this, they neverthelefs acquire fuch a tendency 

 to feparale and divide themfelves, as renders them much more 

 diflicult tofpin, and they form a thread of much lefs folidity." 

 Since that period difl^erentartifts have employed themfelves, 

 with various fuccefs, in methods of obtaining from flax a 

 matter analogous to cotton. A Swifs, Cit. Clays has even 

 formed an efiablifliment fome time ago, in which this kind of 

 preparation is executed. 



• From Journal deL'EcokPolytcchuIque, Tome IV, p. 319. 



I know 



