Abstract: A process has been developed for the oxidation of organic substances, dissolved or dispersed in an aqueous system, with a gas containing molecular oxygen at elevated temperature and under elevated pressure chiefly to carbon dioxide and water, with subsequent phase separation of the reaction mixture into a gaseous phase substantially containing inert gas, carbon dioxide, steam and organic constituents and a liquid phase substantially containing water, characterized in that the pressure is adjusted, at the given temperature, so that by evaporation of water from the aqueous system, more steam than the exothermicity of the oxidation reaction gives rise to, goes into the gaseous phase, which is fed to a heat exchanger in which the amount of heat required to maintain the oxidation temperature is completely or partially transferred to a mixture of water and a gas containing molecular oxygen, which mixture flows in on the other side of the heat exchanger and is subsequently fed to the reactor.

Abstract: A spherical shell mounted on a base for pivoting movement about a diameter has a first aperture in which a frosted groundglass screen is mounted parallel to the pivot axis. Images are sequentially projected on the screen from the vertically upright beam of a cassette-type sound projector by a deflecting mirror. Cassettes are inserted in and withdrawn from the projector through a second aperture subjacent the first aperture. The perforated cover normally closing the second aperture carries the loudspeaker of the sound system. Cooling air is blown on the projector lamp from bottom openings of the shell by a fan arranged between the shell and a bracket on which the projector rests.