The Lacanian Delusion
Not true. Even if by ``Newton's Laws'' Roustang just means the law of gravitation, and we rule out astronomical predictions (the positions of the planets, the existence and orbits of Uranus and Neptune, the bending of light by the Sun), as not experiments within the meaning of the act, there were Cavendish's tests of the inverse square law in the 18th century. For a clear and succint discussion of this classical experiment, see The Feynman Lectures on Physics, vol. I, p. 7-9.