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Showing results for 1 - 20 of 346 1940s 1980s 1900s 1970s

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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. Biology "Immunity II." (Chicago)

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

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

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

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

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

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

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

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

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

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

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

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

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

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