feb 26, 1952 - image 51
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Rosalind Franklin works with DNA and X-Ray crystallography and develops “Image 51” 18 July 1952 http://blogs.discovermagazine.com/fire-in-the-mind/2013/04/25/on-dnas-anniversary-how-rosalind-franklin-missed-the-helix/#.WjC8vLbMy1s
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