The 1904 World's Fair, St. Louis, Missouri: an exhibition hall showing the Hygeia Filter Company stand: elevated view. Photograph, 1904.

Date:
1904
Reference:
571949i

Licence: Public Domain Mark

Credit: The 1904 World's Fair, St. Louis, Missouri: an exhibition hall showing the Hygeia Filter Company stand: elevated view. Photograph, 1904. Wellcome Collection. Source: Wellcome Collection.

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