|Reference is made in The Telegraph in America, when giving an account of the Peoples Telegraph, "The insulators, instead of being made of glass, were of glazed earthenware, imperfectly vitrified, though the thin crust of which the wire soon sawed its way, and left the soft pottery exposed to the rain, which soon soaked into the mass." Peoples Telegraph ran from Louisville, Kentucky to New Orleans, Louisiana. Pictured here (right) is a porcelain block manufactured for the Placerville and Humboldt Telegraph Company by the Pacific Pottery Company in Sacramento, California.|
These three blocks are believed to have been used on the Peoples Telegraph line.
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