Photograph by Rusell and Sons printed in the Illustrated London News (1894). The Image shows the interior of the pedestrian footbridge on the newly constructed Tower Bridge in London. This lattice footbridge was of light but substantial construction, and linked the upper parts of the bridge's two towers at 140 feet above the high water level, enabling pedestrians to cros when the central section of the bridge was open. Tower Bridge is an example of a bascule bridge, where the central section can be opened drawbridge-style to enable shipping to pas through.
© Science Museum / Science & Society Picture Library