Patrick Coad (1783-1872), an Irish immigrant who settled in Philadelphia, was the first patentee of a graduated galvanic battery with insulated poles. Touting his battery among other uses as an instrument that helped cure various diseases, Coad’s invention attracted a good deal of attention within the scientific and medical communities. A teacher whose interests focused on medicine and the sciences, Coad also travelled throughout Pennsylvania and the surrounding area as a lecturer on the natural sciences. The collection includes Coad’s correspondence, his lecture and medical notes, and ephemera, such as newspaper clippings, pamphlets and broadsides, publicizing his galvanic battery and lectures. Several of Coad’s family members are also documented through correspondence, ephemera, and estate items, including his son Joseph R. Coad (1829-1868), a prominent Philadelphia physician. A family scrapbook with miscellaneous materials is also included.
Held at: Philadelphia Archdiocesan Historical Research Center [Contact Us]