the invention will now be described

the invention will now be described,by way of example,with reference to the accompanying diagrammatic drawings,in which:fig.1 shows a schematic sectional side elevation of an electrolytic test cell operable in accordance with the present invention;fig.2 shows a similar view of a somewhat more complex cell operable in accordance with the invention;fig.3 shows a sililar view of a battery of cells operable in accordance with the present invention;fig.4 showsa sectional plan view in the direction of line IV-IV in FIG.3;fig.5 shows,diagrammatically,another cell in accordance with the invention;andfig.6 shows a schematic sectional side elevation of a reactor forming part of the cell of FIG.5.in FIG.1 of the drowings,reference numeral 10 generally designates an electrolytic cell comprising a cylindrical steel housing 12,concentrically within which is located a beta-alumina tube 14,the upper ends of which housing and tube are sealed off by an electrically insulating seal 16.