Madness blew so violently on the immeasurable air pump of the circuit, that it took the form of a spiral, rising like a screw to the Zenith.. [describing the Brescia automobile races, in 1907]
Source, in full
In 'La mort tient le volant...', in La ville charnelle, E. Sansot, Paris 1908, p. 228; as quoted in Inventing Futurism: The Art and Politics of Artificial Optimism, by Christine Poggi, Princeton University Press, 2009, p. 27, (note 77)