ocr: This page contains a clear discussion of - the basic principle of: - - stationary waves: "How waves do not penetrate, one another, but leap back Fron-the-percussed place, and every reflex motion flies away at equal angles from the percussion place. L - - - A One of the most innovative aspects of Leonardo's - hydraulic interests is revealedin his analysis of the dynamics of fluid flow to maintain stationary waves. This law was only rediscovered bya scientist in 1673, when Christian Huygens formulated the same principle.
