— 6 - 



Table of the high tides in the different ports, average 

 height of the wave and its velocity of translation 



CURVES OF THE 



AT THE DIFFE- 

 RENT PORTS. 



The curves of the height of the water at all the gauges, 



CURVES OF THE . „ . ~ . . , n 



height of water placed since the creation oi this Commission, has been 

 drawn, and also those at other gauges of which existed 

 records from years before, as at Fray Bentos, Concepcion 

 del Uruguay and Libres. The diagram of the principal 

 gauges are shown ( Sheets V. VI, VII, VIII & X ). 



Studying the curves of the heights of the water it is 

 very easy to account for the actual conditions of access 

 to the different ports and also for the continuous varia- 

 tions of level which the river undergoes owing to the 

 tides during the periods when the river is low. It can 

 also be observed that the small rises, which in this case 

 take place above Concordia, arc not sufficient to raise the 

 level of thi> river below the Port of Concepcion. 



It may also be noted that, though the greatest rises 

 observed in the River Uruguay generally coincide with 

 a period when the Parana is low and vice versa, the fall 

 of the water in the first named river is more considerable 

 when the above mentioned relation does not exist, which 

 is onlv a consequence of the small slope of the River 

 Uruguay. 



