E222 -- Theorie plus complette des machines qui sont mises en mouvement par la reaction de l'eau

(A more complete theory of machines which are activated by their reaction to water)

(based on Clifford A. Truesdell's introduction to Opera Omnia Series II, Volume 12)
In this, as well, as in E259, Euler goes into the entire theory of his main idea of E179 in greater generality. He then proceeds to calculate the optimum proportions for his proposed turbine.

According to C. G. J. Jacobi, a treatise with approximately the same title was presented to the Berlin Academy on September 13, 1753.

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