Eiffel Tower was to be dismantled in 1909, when its ownership would revert to the City of Paris. The City had planned to tear it down (part of the original contest rules for designing a tower was that it should be easy to dismantle) but as the tower proved to be valuable for communication purposes, it was allowed to remain after the expiry of the permit. Eiffel made use of his apartment at the top of the tower to carry out meteorological observations, and also used the tower to perform experiments on the action of air resistance on falling bodies. For the
Eiffel Tower (Delaunay series) had announced a plan to sell 150 copies of the book, which would equal in height the Tower itself. The Russian film director Sergei Eisenstein's appreciation of Delaunay's work informed his Soviet montage theory, as he imagined developing cinematically "a dynamic fusion of a series, moving past the spectator, of those hundred views of the Eiffel Tower" rather than a "summation within a single canvas". Cendrars's 1924 essay on Robert Delaunay describes his feminization of the Tower, and Sonia Delaunay described the Eiffel Tower as her husband's "Eve future" Eiffel Tower (Delaunay series) The Eiffel Tower series of Robert Delaunay