U.S. National Archives
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1933 - Standing before 74 tons of iron and copper are Professor M. Stanley Livingston (left) now of the Massachusetts Institute of Technology and Professor Ernest Orlando Lawrence.  Magnet development has continued to expanded more nearly to its capacity, producing the new nuclear particles known as neutrons in quantities sufficient for actual human therapy.  Negative envelope dated February 1, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

1933 - Standing before 74 tons of iron and copper are Professor M. Stanley Livingston (left) now of the Massachusetts Institute of Technology and Professor Ernest Orlando Lawrence. Magnet development has continued to expanded more nearly to its capacity, producing the new nuclear particles known as neutrons in quantities sufficient for actual human therapy. Negative envelope dated February 1, 1940. Principal Investigator/Project: Analog Conversion Project [Photographer: Donald Cooksey]

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U.S. National Archives

The objects in this collection are from The U.S. National Archives. The U.S. National Archives and Records Administration (NARA) was established in 1934 by President Franklin Roosevelt. NARA keeps those Federal records that are judged to have continuing value—about 2 to 5 percent of those generated in any given year. There are approximately 10 billion pages of textual records; 12 million maps, charts, and architectural and engineering drawings; 25 million still photographs and graphics; 24 million aerial photographs; 300,000 reels of motion picture film; 400,000 video and sound recordings; and 133 terabytes of electronic data. All of these materials are preserved because they are important to the workings of Government, have long-term research worth, or provide information of value to citizens.

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