Chemist testing petrol, 1932.
© NMeM / Daily Herald Archive / Science & Society Picture Library
A photograph of a chemist watched by a crowd as he carries out tests on Shell Mex petrol, taken by Cardew for the Daily Herald newspaper on 7 October, 1932. This photograph has been selected from the Daily Herald Archive, a collection of over three million photographs. The archive holds work of international, national and local importance by both staff and agency photographers.