( 853 ) 



velocity of the high water flow of 3.50 M. and furthermore La 

 Charente with an amplitude of the tides of 6.35 M. and a velocity 

 of the high- water flow of 2 M. 



As regards the calculation of Mr. Kleitz, it is as follows-. 



ATLANTIC 



PACIFIC. 

 g High-tide level. 



Mean sea-level. 



D= 277 M Z 



Low-tide level. 



3= \9$n z 



According to the above figure the area of the wet section of the 

 canal on the side of the Pacific was adopted to be 385 M. 2 at high- 

 water and 195 M. 2 at low water. 



The difference between the mass of water in the canal at high 

 and low tide is then taken for the volume of the prism ABC. 



385 — 195 



therefore = 73000 X 



M 3 = 6.935.000 M 3 . 



As the interval between high and low tide is about six hours, 

 the change of the mass of water per second is found to be 321 M 3 

 on an average. The mean wet section of the canal on the side of 

 the Pacific being »/, (385 -f 195) M 2 , that is 290 M 2 , Mr. Kleitz 

 derives for the velocity of the inflow during the whole period of 

 high tide or for the outflow during the whole period of low tide 



?51=i.iiii. 



290 



Furthermore, assuming that the most rapid change of the mass of 

 the water will occur about at the time at which the sea-level is 



