asked the Minister of Supply what steps have been taken to investigate the Dycker Hoff Sailles process for the manufacture of aluminium; and what advantages are claimed for this process over the Bezer process?

It is assumed that the hon. Member refers to the Seailles and the Bayer processes for the production of aluminium oxide. I understand that the former process has already been investigated by the aluminium industry in various countries, but that they do not regard it as possessing any advantage over the Bayer process normally used. It will be appreciated that these processes relate to the production of alumina—and not to the method of producing aluminium, the raw metal from alumina.