STUDY IV. 259 



very peaks ; it frequently requires feveral hours 

 walking to get acrofs them. 



The Tandy belts have a ftill farther ufe, that of 

 contributing to the repair of the wade, which the 

 territory of the mountain, from time to time, un- 

 dergoes : perpetual clouds of duft iflue from 

 them, which rife, in the firft inftance, on the (liores 

 of the Sea, where the Ocean forms the firfb depo- 

 fits of thefe fands, which are there reduced to an 

 impalpable powder by the inceffant dalhing of 

 the waves upon them ; we afterwards find thefe 

 clouds of duft in the vicinity of lofty mountains. 

 The conveyance of the fands is made from the 

 fhores of the Sea into the interior of the Conti- 

 nent, at different feafons, and in various manners. 

 The moft confiderable happens at the Equinoxes, 

 for then the Winds blow from the Sea into the 

 Land. See what Corneille le Bruyn lays of a fandy 

 tempeft, in which he was caught, on the fhore of 

 the Cafpian Sea. Thefe periodical conveyances 

 of the fand form a part of the general revolution of 

 the Seafons. But as to the interior of different 

 countries, partial tranfits take place every day, 

 which are very perceptible toward the more ele- 

 vated regions of the Continents. 



'to' 



All travellers who have been at Pckin, are 

 agreed, that it is not poffible to go abroad, during 



s 2 a part 



