Vernon Ellis Cosslett

Vernon Ellis Cosslett, FRS (16 June 1908 – 21 November 1990) was a British microscopist.

The eighth child (of six sons and five daughters) of Edgar William Cosslett (1871–1948), a Welsh cabinet maker and carpenter, clerk of works on the estate of the Earl of Eldon at Stowell Park and latterly a builder, and Anne (née Williams; 1871–1951), he was raised at Cirencester and educated at Cirencester Grammar School, the University of Bristol, the Kaiser-Wilhelm-Institut, Berlin-Dahlem, and University College, London. He was a research fellow at the University of Bristol after completing his PhD there in 1932, having been awarded an H. H. Wills Memorial Fellowship, remaining there until 1935. He then lectured at Faraday House Engineering College, London, until 1939, whilst undertaking part-time research at Birkbeck College, London. Between 1939 and 1941 he was Keddey-Fletcher-Warr Research Fellow of London University, working at the University of Oxford as a temporary lecturer, then lecturing in physics at the University of Oxford Electrical Laboratory from 1941 to 1946.

From 1947, as an ICI Research Fellow, Cosslett worked with William Lawrence Bragg at the Cavendish Laboratory, Cambridge University on the electron microscope and founded the Electron Microscopy Department. He also developed improved x-ray machines.