Ministry of Supply scientist at work, 6 December 1939. 'The Ministry of Supply has a permanent staff of about 800. They include specialists in practically every branch of applied physics, chemistry and engineering. Teams of scientists are engaged in dealing with special problems affecting every branch of munition and supplies. The Ministry's War Emergency Scheme represents the most comprehensive mobilisation of scientific and technical talent in the national service ever attempted.' Photograph by Reuben Saidman.
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