Diagrams, 'Investigations of schemes for improving the Seine estuary [France]' by Leveson Francis Vernon-Harcourt Three pages of of nine diagrams each, labelled schemes A, B1, B2, C, D, D bis, E, E bis and F respectively, showing a map of the estuary of the Seine at Le Havre and proposed plans for improvement. Subject: Civil engineering Prints of these diagrams were published in volume 45 of the Proceedings of the Royal Society alongside the paper 'The principles of training rivers through tidal estuaries, as illustrated by investigations into the methods of improving the navigation channels of the estuary of the Seine'. 1889