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LC Subject Heading: Signals

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Item 6157

Signals at the Portland Observatory, ca. 1807

Signals at the Portland Observatory, ca. 1807

Contributed by: Maine Historical Society Date: circa 1807 Location: Portland Media: Watercolor on paper

Item 17324

Model of the Portland Observatory, ca. 1905

Model of the Portland Observatory, ca. 1905

Contributed by: Maine Historical Society Date: circa 1905 Location: Portland Media: Painted wood

Item 174

Signal flags, Portland, ca. 1800

Signal flags, Portland, ca. 1800

Contributed by: Maine Historical Society Date: circa 1800 Location: Portland Media: Paper

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