19^ ^ugujl 1749. 



goes down, the more the faline tafte encreafes. 

 At firft the weflern {here of the river has 

 fine, but low corn-fields, but foon after 

 the high mountains run clofe to the river 

 fide. Before they come to the river the 

 hilly Olores confift of black lime-flate ; but 

 as foon as the high mountains appear on 

 the river fide, the lime-Hates dilappear. 

 For the fi:one, of v/hich the high moun- 

 tains confift, is a chalky rock-ftone, mixed 

 with glimmer and quartz ^^ The glimmer 

 is black ; the quartz partly violet, and 

 partly grey. All the four conftituent parts 

 are fo well mixed together, as not to be 

 eafily feparated by aa inftrument, though 

 plainly diflinguilliable with the eye. Dur- 

 ing our journey to-day, the breadth of the 

 river was generally three French miles. 

 They fhewed me the turnings the fhips 

 are obliged to fail in, which feem to be very 

 troublefome, as they are obliged to bear 

 away for either fhore, as occafion requires, 

 or as the rocks and fands in the river oblige 

 them to do. 



For the difiance of five French miles we 

 had a very dangerous paffage to go throughj; 

 for the whole weilern (hore, along which 

 we rowed, confids of very high and fteep 



* Saxum micaceo quarzofo-calcarium. 



mountains^ 



