Abstract: A fused salt reduction cell for producing aluminum comprises a cathode pot having an outer steel shell supported on or by metal structural parts, a thermally insulating layer and an inner lining which is of carbon, is electrically conductive and is resistant to attack by the molten aluminum and the electrolyte.In the region of the electrolyte there is a layer which runs horizontally around the cell dividing the carbon lining into a lower part and an upper part. This layer is of a material which is resistant to the electrolyte at temperatures up to 1000.degree. C. and has a much lower shear strength than that of the carbon lining.

Abstract: An apparatus for sequentially treating one or more specimens of cellular material with a plurality of treating liquids. The specimens are mounted in one or more treating chambers and the liquids in storage cylinders. Means selectively connect the storage cylinders to the treating chambers to selectively treat the specimens with the liquids.