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X-ray diffraction photographs and photographs of DNA molecular models, 1951-c1963

X-ray diffraction photographs and photographs of DNA molecular models, probably used as article illustrations (articles not identified), including: DNA photographed at 0% humidity, Feb 1951; C form Li DNA photographed by Donald Marvin, 1 Jun 1958; three mounted comparison illustrations of a molecular model of DNA, a Fourier synthesis map of the molecular structure of DNA and a wire model of DNA structure, ND; electron microscope photograph of bifringent crystalline regions in dried DNA, [1963]

X-ray diffraction photographs and other illustrations, [1950-2000]

X-ray diffraction photographs, graphs, printed data sets, molecular diagrams, Fourier synthesis maps and photographs of molecular models, possibly prepared as teaching aids or for publication (articles not identified). Also photograph, taken c 2000 (7 copy prints), of the DNA sample holder made out of a paper clip, used to hold the Signer DNA for the first x-ray diffraction photographs, 1950

X-ray diffraction images of B form DNA and images obtained with a Lipson diffractometer, 1950 and 1955

Photographs, glass slides and negatives of B form DNA optical transform patterns, and images of dotted outlines of the spots on the B form pictures, obtained with an optical diffractometer developed by Henry Lipson (1910-1991). Clive Hooper, Bill Seeds and Alec Stokes wrote an account of their adaptation of the Lipson method for macro molecules such as DNA, ‘Photographic Preparation for the Large Molecules for the Lipson Diffractometer’, published in Nature, Volume 175, 16 Apr 1955, p679-681. File also includes photographs of early models of DNA structure, [1950]. Original file title ‘File Lipson data’

World War One training pamphlets, 1914-1918, and a pamphlet on mountain warfare, 1920

File contaning General Staff pamphlets relating to training of units during World War One, notably on infantry attack formations, the employment of specialists during the attack, tactical schemes of 4 Army, and the training of platoons, companies, battalions and divisions for offensive action. Also including pamphlet on Mountain warfare produced by General Staff India, 1920. 1 file.

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