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Showing results for 1 - 50 of 349 1920s 1980s 1940s 1950s

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  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. Leo Szilard Papers

    • A selection of documents, photos, and audio-visual materials of the nuclear physicist and inventor Leo Szilard.
    • Access: Some items restricted
    • Creation Date: 1898-1998
  9. San Diego History Center Photographs

    • Over 3,000 images from the San Diego History Center that document the rise and decline of the California fishing industry. These historical photographs from the 1870s to the 1980s represent the work of many important San Diego photographers.
    • Creation Date: 1880-1980
  10. Fish Catch Statistics. California Department of Fish and Game

    • Amounts and values of marine resources caught/landed by California's commercial fisheries.
    • Creation Date: 1916-1986
  11. Scripps Institution of Oceanography Letters, Clippings, Ships' Logs

    • Images of historical documents about Scripps expeditions.
    • Creation Date: 1873-1987
  12. Oceania

    • Photographs, films and dissertations, documenting aspects of the cultures and peoples of the Pacific Islands, with a strong emphasis on Papua New Guinea and the Solomon Islands.
    • Creation Date: 1919-1989
  13. Biology "Immunity II." (Chicago)

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  14. Biology 1 (Chicago). Includes draft of "Science is my racket" and "Chemostat"

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  15. Biology 7

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  16. Notebook 3

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  17. Patents - Liquid/Liquid extractor

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  18. Physics "Uranium"

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  19. Physics (G-22)

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

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  21. [Biology (G-31)]

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  22. [Biology (K-12)]

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

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  24. Aging (S-48) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  25. American Arbitration Association

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

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

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  28. Antibody letters (V-83) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  29. Atomic Energy Control Conference

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  30. Bethe Chicago (G-29)

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  31. Bibliographic materials 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  32. Biographical publications

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

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  34. Biology "DNA" 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  35. Biology (Aging G-27) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  36. Biology (B-1) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  37. Biology (E-11) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  38. Biology (E-52) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  39. Biology (R-26) 

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  40. Biology 4 (Chicago)

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo
    • Date: between 1898 and 1998
    • Format: text
  41. Biology Algae (E-33) 

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

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

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  44. C- miscellaneous - Correspondence - part 1

    • Collection: Leo Szilard Papers
    • Name: Szilard, Leo -- correspondence
    • Date: between 1898 and 1998
    • Format: text
  45. Canfield, Cass

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

    • Collection: Leo Szilard Papers
    • Date: between 1898 and 1998
    • Format: text
  47. Cold Springs Harbor Symposium

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

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

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

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