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David R. Griffith
Remarks: A note in the accession record (1952.11) states that "David R. Griffith, master mechanic made his own tools. Was naval marine constructor during Civil War. Installing engines in five monotors at Kittery Naval Yard, Portsmouth New Hampshire invented clam-shell dredge. Whilst Superintendant American Dreding Company, Camden, N. J. Was chief engineer Philadelphia Waterworks? Under Frederic Graef designer of First River Waterworks, "Fairmount Waterworks" using turbine power for pumping after construction of Fairmount Dam across the Schuylkill River ? [sic] in operation many years."