<unk>  Elsie<unk>  (25 July, 1920 – 16 April, 1958) was an English biophysicist and crystallographer who made important contributions to the understanding of the fine structures of DNA, viruses, coal and graphite.<unk>  is best known for her work on the X-ray diffraction images of DNA which formed the framework of Watson and Crick's hypothesis of the double helical structure of DNA in their 1953 publication, and when published constituted critical evidence of the hypothesis. Later she led pioneering work on the tobacco mosaic and polio viruses. She died in 1958 of bronchopneumonia, secondary carcinomatosis, and  cancer of the ovary, within minutes of her last paper being read at the Faraday Society.
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