TOPOGEAPHY OF RIO GEANDE. 



247 



engaged in the cultivation of onions, the only plant that thrives in the sandy 

 soil of the district. 



The railway connecting Rio Grande do Sul with Pelotas is continued west- 



Fig. 109. — E.IO Grande do Stjl and its Bae. 



ecile 1 : 150,000. 



Ci to 16 

 Feet. 



Depths 



16 to .3-2 

 Feet. 



32 Feet 

 aud upwards. 



3 Miles. 



wards along the Uruguay frontier to the town of Bagé. This place lies near the 

 ancient Santa Tecia within the basin of the Rio Negro, which flows almost entirely 

 in the territory of Uruguay. The neighbouring hills abound in lead, copper and 



