Articles on photographic techniques not directly mentioning George Washington Wilson The Photographic News, September 26th 1862, 'English Apparatus - Examination of Dallmeyers Binocular Camera and Lenses' (photocopy) Photographic Preservation: Modern Techniques by Eugene Ostroff, FRPS, Curator of Photographic History at the Smithsonian Institution, Washington, USA, 1974, (photographic) Unreferenced Article on: Environmental Conditions, Sleeves, Compartment Boxes, Cabinets The Collodion Process, by Dr D.B.Thomas, BSc, PhD, Keeper of Museum Services, The science museum, undated, photocopy obtained from British Library June 1979 Four Unreferenced extracts from the same source book. Comprises: 4. The Wet Plate Period; 5. Stereoscopic Photography; 6. Cartes-de-Visite; 7. The Dry Plate The British Journal of Photography 4, vol 123, number 6027, Comments and Letters page Glass Plate Negative: Preservation and Restoration by Martine Gillet, Chantal Garnier & Francoise Flieder, 1989 'An investigation into the preservation of historic photographic collections within Scottish Academic Libraries' by Ismay Thomson, 2000 An Introduction to Picture Research, extract, unreferenced c 1892 - 1974