Patent model (U.S. Patent No. 116,620) of a steam and hot water heater, made by Nathan Middleton and Stephen Morris of Philadelphia, PA, and patented on July 4, 1871. Painted black. Consists of a straight tapered, hexagonal boiler formed by six staves or compartments individually connected to the tank by six elbow pipes. Four circular holes on opposite side of tank receive pipes to radiators; single supply pipe at top corner of one side. No marks on object, but old darkened paper tags tied to purple (faded) ribbon are printed and handwritten with patent information and object numbers.
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