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[en] This article first proposes a presentation of the tidal theory and outlines the roles of Newton (to know the phenomenon), Laplace (to understand it) and Poincare (to act on it). The author then describes some tidal characteristics, notice than they can be different in different locations of the planet in frequency (two tides a day here, one tide a day there, or negligible) as well as in amplitude. Then, he addresses the history of cycles of use of tides, notably by exploiting the filling and emptying of basins by means of turbines (simple effect dam, double effect dam, pumping). He evokes some historical projects of tidal power plants in France, and then more particularly the Rance tidal power plant project, the Chausey and Minquiers projects. Article published in 'L'Astronomie' journal, Vol. 69, Dec. 1955, p.449-469.