 Meanwhile, Urbain Le Verrier, on November 10, 1845, presented to the "Académie des sciences" in Paris a memoir on Uranus, showing that the pre-existing theory failed to account for its motion.Unaware of Adams's work, he attempted a similar investigation, and on June 1, 1846, in a second memoir presented to a public meeting of the Académie, gave the position, but not the mass or orbit, of the proposed perturbing body.Le Verrier located Neptune within one degree of its discovery position.