— 15 — 



may reach a height of about three or four meters as an 



average. 



Velocity of the 

 current. 



At Fray Bentos these differences of level are more or 

 less the same, being- 3,62 meters for the greatest rises of the 

 river and 2,30 meters for the highest tides. 



Up to the present time no special studies of the veloci- 

 ties of the oeurrent have been made in this part of the ri- 

 ver, but it has been observed that, inconsequence of the in- 

 fluence of the tides, its velocity is sometimes zero and even 

 in a direction up river, when the river is low. 



After having passed Carbon -and Chaparro points, going ^£^ b g.£2J 

 up river, the navigable channel is deep, wide, nearly 

 straight and very close to the Oriental (.'oast, which cir- 

 cumstance makes its navigation easy till Arena! Grande, 

 where there is a wooden mole, is reached. 



From here the channel curves towards the Argentine Canal de Marque* 

 Coast, till after having arrived more or less in the center of 

 the river it returns with a sudden bend towards the Oriental 

 Coast in the direction of the point called «Cabeza de Negro ». 

 In the latter part of the channel, named the « Canal de 

 Marquez » there is only a depth of 20 feet meanwhile before 

 arriving at it there are depths of 50 feet and more. 



Navigation in front of this point is easy, but soon the 

 channel begins to change its direction and to become narro- 

 wer, forming what is called the « Amarillo » bar which has 

 only a depth of 18 feet by a width of about 250 meters, 

 the river itself at this place being about 12.000 meters wide. 

 After having again changed direction the « Tarantanas » 

 channel, the sides of which are very steep and where 

 there is a depth from 36 to 52 feet, is reached. 



In front of the Delta of the River Negro the channel 

 goes nearer to the Oriental Coast and though forming a 

 curve, this circumstance and the fact that it is broader a1 

 this part with depths varying from 28 to 40 feet, makes its 

 navigation easy. 



Above the Northern mouth of the River Negro, North of 

 the island Yuqueri the channel divides itself into two 

 others named the English and the Caracoles channels. 



The first is navigated by vessels of great draught and by 

 the ilver steamers. At its beginning it is narrow, 250 me- 



Amarillo Pass. 



Tarantanas 

 channel. 



English channel 



and Caracoles 



channel. 



