Coloured postcard 'Rouen - Le Pont Transbordeur', showing two ladies on board a ship on the Seine at Rouen, Northern France. The transporter bridge at Rouen was designed by the French engineer Ferdinand Arnodin and opened in 1899. This type of bridge represents one solution to the problem of constructing a crosing over a waterway navigable by large ships. It is a form of suspension bridge with a high gantry from which a moveable platform is suspended, which carries the traffic acros the river. In the case of the Rouen bridge, the crosing, on a platform driven by electric motors, took 55 seconds. The bridge was destroyed by the French army in 1940 in a bid to slow down the advance of the Germans.
© Science Museum / Science & Society Picture Library