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  1. SIO Photographs Collection

    • A diverse assortment of photographic images acquired by the former SIO Archives and collated into one collection. Images include SIO staff and faculty, the campus, and scientific expeditions.
    • Creation Date: between 1900 and 2006
  2. Compressor at La Dificultad mine, Pachuca, Hidalgo

    • Collection: José Villegas Collection on Mining
    • Name: Compañía Real del Monte y Pachuca
    • Date: between 1895 and 1983
    • Topic: Mining machinery
    • Format: image
  3. Hacienda de Beneficio Loreto, Pachuca, Hidalgo

    • Collection: José Villegas Collection on Mining
    • Name: Compañía Real del Monte y Pachuca
    • Date: between 1895 and 1983
    • Topic: Silver mines and mining
    • Format: image
  4. La Dificultad mine steam engine house chimney, Pachuca, Hidalgo

    • Collection: José Villegas Collection on Mining
    • Name: Compañía Real del Monte y Pachuca
    • Date: between 1895 and 1983
    • Topic: Silver mines and mining
    • Format: image
  5. La Dificultad mine steam engine house, Pachuca, Hidalgo

    • Collection: José Villegas Collection on Mining
    • Name: Compañía Real del Monte y Pachuca
    • Date: between 1895 and 1983
    • Topic: Silver mines and mining
    • Format: image
  6. Casa de la máquina de vapor y chimenea Real del Monte

    • Collection: José Villegas Collection on Mining
    • Name: Compañía Real del Monte y Pachuca
    • Date: between 1895 and 1983
    • Topic: Silver mines and mining
    • Format: image
  7. José Villegas Collection on Mining

    • Documents and photographs relating to silver mining operations in Mexico, principally Real del Monte and Pachuca during the periods of British (1824-1849) and Mexican (1849-1906) capitalization and management.
    • Creation Date: circa 1825-1983
  8. Baja California and the West Postcard Collection

    • Postcards depicting California, Baja California, and the Southwest, mostly from the early 1900s. Images of Tijuana, Ensenada, Balboa Park, and the California missions are well-represented in this collection.
    • Creation Date: 1900-1989
  9. Papua New Guinea Patrol Reports

    • Reports from government patrols are a major source of primary information on Papua New Guinea’s colonial-era history.  Patrol officers and other officials wrote detailed documents reporting on all aspects of the work carried out by the patrols.  The reports give first-hand accounts on many topics, from first contact with remote Highland villages, to census counts, tax collection, health care, justice, labor recruiting, plantations, missionaries, anthropological descriptions, tribal warfare, languages, and more.  The reports in this collection date primarily from the post-World War II era of Papua New Guinea, up through 1975, when PNG gained independence from Australia; a few pre-War reports are also included.
    • Creation Date: 1912-1976
  10. Scrapbook of clippings #4

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  11. Atomic bomb development

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  12. Arms Control

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  13. Scrapbook of clippings #3

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  14. Angels Project

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  15. Scrapbook of clippings #2

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  16. Amino Acid Charts

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  17. Aging

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  18. Scrapbook of clippings #1

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  19. Miscellaneous Materials

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  20. University of Colorado Medical Center

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  21. Miscellaneous - General Materials - 3

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  22. University of Chicago - Miscellaneous

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  23. Miscellaneous - General Materials - 2

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  24. Miscellaneous - General Materials - 1

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  25. University of Chicago - Council of the University Senate

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  26. University of Chicago - Board of Trustees

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  27. U.S. War Department

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  28. U.S. Senate

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  29. Patents 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  30. Freedom of Information Act - Miscellaneous 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  31. Freedom of Information Act - U.S. Office of Personnel Management 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  32. Freedom of Information Act - General Services Administration 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  33. Freedom of Information Act - Federal Bureau of Investigation (FBI) - 3

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  34. Freedom of Information Act - Federal Bureau of Investigation (FBI) - 2

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  35. Freedom of Information Act - Federal Bureau of Investigation (FBI) - 1

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  36. Freedom of Information Act - Department of the Navy 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  37. Freedom of Information Act - Department of the Army - 2

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  38. Freedom of Information Act - Department of the Army - 1

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  39. Freedom of Information Act - Department of State 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  40. Freedom of Information Act - Atomic Energy Commission 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  41. Freedom of Information Act - Freedom of Information Act 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  42. Outline for Proposed Leo Szilard Biography: Roladex chronology of events in Leo Szilard's life

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  43. Outline for Proposed Leo Szilard Biography: Material from History Box Folders not Used in Bailyn Set 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  44. Outline for Proposed Leo Szilard Biography: "From Jacob Marshak" 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  45. Outline for Proposed Leo Szilard Biography: For possible addition to Bailyn materials 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  46. Collected Works of Leo Szilard: Proposed Format for Volume II 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  47. Collected Works of Leo Szilard: Notes - 5

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  48. Collected Works of Leo Szilard: Notes - 4

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  49. Collected Works of Leo Szilard: Notes - 3

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  50. Collected Works of Leo Szilard: Notes - 2

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  51. Collected Works of Leo Szilard: Notes - 1

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  52. Szilard's Ten Commandments with Introduction by Trude 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  53. "Reminiscences" Excerpts 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  54. "Perspectives" 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  55. General Materials - MIT Press, Harvard Press, and Others 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  56. Writings - Miscellaneous Documents 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  57. Biographical References 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  58. Biographical References for Extension of Leo Szilard Biography 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  59. List funding agencies 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  60. Wiedergutmachung. Restitution

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  61. U.S.S.R

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  62. Silver

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  63. Sardi Luncheon

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  64. Resumes

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  65. Requests for reprints - Post card requests

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  66. Requests for reprints - General correspondence

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  67. Population Statistics in the U.S. and the U.S.S.R.

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  68. Peace Movement - Public Response

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  69. Passport Material

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  70. Roosevelt, Franklin D 

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  71. P-Miscellaneous - Correspondence

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  72. M-Miscellaneous - Correspondence

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  73. Jet Injections

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  74. L-Miscellaneous - Correspondence

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  75. Immunity

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  76. Hydrogen Bomb

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  77. Genetics

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  78. Fertility Control

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  79. Equipment and supplies catalogs - 2

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  80. G-Miscellaneous - Correspondence

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  81. Equipment and supplies catalogs - 1

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  82. Enzymes - graphs and charts

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  83. E-Miscellaneous - Correspondence

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  84. Dispersal of cities

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  85. Coronary Heart Disease

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  86. Compensating Key Personnel

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  87. Chemostat - Transparencies

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  88. B-Miscellaneous - Correspondence

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  89. Chemostat - Figures

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  90. Central Nervous System

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  91. Cellulose Decomposition

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  92. Scrapbook of clippings #7

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  93. Canfield, Cass

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  94. Bullsperm - Photographs

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  95. Bullsperm - General materials

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  96. Scrapbook of clippings #6

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  97. Atomic Energy Commission

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  98. Scrapbook of clippings #5

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  99. U.S. Mission to the United Nations

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text