• In the experimental sciences, the epochs of the most brilliant progress are almost always separated by long intervals of almost absolute repose.

    François Arago, Robert GRANT (F.R.A.S.), Baden Powell, William Henry SMYTH (Rear Admiral.) (1857). “Biographies of Distinguished Scientific Men ... Translated by ... W. H. Smyth ... the Rev. Baden Powell ... and R. Grant”, p.265