Abstract: The invention provides an electrode for use in an electrochemical reactor. The electrode comprising a plurality of metallic filaments consisting of carbon fibers coated with a metal, each of the metallic filaments being in electrical contact with at least several of the other metallic filaments for transmitting an electrical potential substantially throughout the electrode when the electrode is in use in the reactor.

Abstract: The invention provides an electrode for use in an electrochemical reactor. The electrode comprising a plurality of carbon fibers in close proximity to one another, each of the fibers being in electrical contact with at least several of the other carbon fibers for transmitting an electrical potential substantially throughout the electrode when the electrode is in use in the reactor.

Abstract: An ice skating arena is described having a skating area arranged to define a plurality of individual ice rinks and interconnecting bridging sections. Cooling means are provided below the said ice skating area and are arranged to provide a continuous ice covering over said rinks and bridging sections in use. Barrier means are provided in association with each said bridging section. Each barrier means is adapted to be selectively positioned across the associated section or to be moved to a non-obstructing position to allow free skating over the section, whereby with all of the barrier means positioned across the associated sections, the individual rinks can be used as self-contained skating areas, or with all of the barriers moved to said non-obstructing positions, skaters can pass freely between the rinks by way of said bridging sections.