Tides in Estuaries 



461 



tide than at neap tide. This is an essential difference between the river tides 

 and the ocean tides, whose low waters are, always and everywhere, lower 

 at spring tide. A graphic presentation of the values of Table 75 shows that 



Table 75. Tides in the Gironde and Garonne Rivers * 



* According to M. Comoy, spring tide 19 September, 1876. 



the connecting line between the low waters of the spring tide cuts the one 

 of the neap tides in the upper section of the tide zone. For the Garonne, 

 this point of intersection lies between Bordeaux and Portets. This, however, 



Table 76. Level of high water of rivers in France 

 (According to M. Comoy) 



