{"value"=>"<p>Technical Papers consist of technical papers, notebooks and the patent file. The technical papers, A-Z, alphabetically arranged by author and title, concern the development of physics between 1935-1960s. The Laboratory Notebooks were kept by Carlson during the development of xerography. The notebooks are arranged in two series. Series A. 1921-1963 and Series Ep. 1938-1961. The remaining notebooks relate to general laboratory work, 1951-1956, patent department, 1950-1951, the notebook of Carlson's assistant Otto Kornei, 1938 and a notebook titled \"Air Dynamics Thermo Kinetic Separator Vertical Levitator\". The Battelle Memorial Institute produced the \"Electrophotography Progress Report 1944-1947\" (2 vols.).</p>"}