72 — 



Sheet K. San Francisco Bar. This bar was deepened to 9 

 feet over a width of 100 metres in order to facilitate 

 the access to the Port of Colon. 



Sheet L. Plan of the Port of Paysandii, which town is situa- 

 ted in the Republic of Uruguay. Though there is 

 plenty of depth in the jjort itself, its access is made 

 difficult by the existence of the Almiron Bar, 9 

 kilometers clown river. 



Sheet M. Almiron Bar with a minimum depth of 10 feet. 

 The execution of the works for improving this bar 

 is left to the Uruguayan Government. 



Sheet N. Map of the anchorage and port of Concepcion del 

 Uruguay. 



Portfo'iio with Sheet 1. Instantaneous sections of the tidal wave, which 



Plans of the Sttl\ # 



dies. show the manner m which the surface oi the Kiver 



Uruguay is affected by the tides of the Atlantic 

 Ocean, which are transmitted over a distance of 

 293 kilometers from the mouth of the river during 

 the periods of a low river. 



Sheet 2. Graphic demonstration of the tidal wave, showing 

 the form of the wave for an ordinary and an extra- 

 ordinary tide. 



Sheet 3. Longitudinal section of the surface of the river Uru- 

 guay below Concordia, showing the slopes of the 

 river at its different heights of water. 



Sheet 4. Graphic demonstration of the relation of the zeros 

 of the water-gauge, which have been levelled by 

 studying the tides as there was no precise level- 

 ling, which is now being carried out. 



Sheets 5 to 9. Graphic demonstration of the observations 

 at the gauges at Nueva Palmira, Fray Bentos, Con- 

 cepcion del Uruguay, Nueva Escocia, Concordia, 

 and Paso de los Libres. 



Sheets 10 & 11. Diagrams of the winds and rainfall regis- 

 tered during the years 1900 and 1901 at Concep- 

 cion del Uruguay. 



Sheet 13. Diagram representing the variation of the flow 

 and velocity for the different stales of the river at 

 Concepcion del Uruguay and Nueva Escocia. as 



