Clark's patent syphon hygienic stove, a flueless gas fire with single Argand gas burner in central column, whereby the burnt gases pass through a system of tubes to be rendered harmless by condensation, with cast iron top and bottom, and copper reflector, patent no 4042 by Samuel Clark in 1881, London, 1881-1900 Clark's patent syphon hygienic stove 1881-1900
