Scaled Down Thames Will Help Solve River's Problems -- Part of a model of the River Thames - the Erith area is shown - is inspected by Chief inspector L.W. Nutt (left) and Inspector W.A. Walker, of the port of London Authority Police. This model, which can reproduce the Thames tides, is the pilot model for a 400 feet long model of the Thames constructed by the Port of London Authority to help solve problems of flooding and silting. Both models are at the Royal Victoria Dock, are faithful reproductions of the Thames. January 25, 1952. (Photo by Planet News)