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Start Over You searched for: Repository The Historical and Interpretive Collections of The Franklin Institute Remove constraint Repository: The Historical and Interpretive Collections of The Franklin Institute Place Philadelphia (Pa. Remove constraint Place: Philadelphia (Pa. Year 1760 to 1764 Remove constraint Year: <span class="from" data-blrl-begin="1760">1760</span> to <span class="to" data-blrl-end="1764">1764</span>

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Frederick Graff maps, technical drawings, and plans on Philadelphia (Pa.) water engineering projects, circa 1683-1875

Held at: The Historical and Interpretive Collections of The Franklin Institute [Contact Us]