Clydeside Family -- There was no easy apprenticeship scheme when William Salisbary began thirty-two years ago. He was taught to rivet with a hammer by foremen who ordered a rivet to be knocked out again if it was not exact in measurement or the plate had been slightly scarred. Today with his rivet gun he works at a greater speed, but still each rivet is identical in size in those he learnt to make, and There's no blemish to be found. July 11, 1951. (Photo by Central Office Of Information Photograph).