Search Results 2 items were found.

LC Subject Heading: Scientific equipment--Maine--Portland

  1. Item 12409
    Neutron reactor shell, Portland Company, ca. 1970
    Neutron reactor shell, Portland Company, ca. 1970
    Contributed by: Maine Historical Society
    Date: circa 1970
    Location: Portland
    Media: Photographic print
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  2. Item 12538
    Chapman electric neutralizing machine, Portland Company, ca. 1904
    Chapman electric neutralizing machine, Portland Company, ca. 1904
    Contributed by: Maine Historical Society
    Date: circa 1904
    Location: Portland
    Media: Ink on paper
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