Systems of Partial Differential Equations for Hypergeometric Functions of Matrix Argument

A device for producing even distribution of a product dissolving in a current of water, such as a cake of chlorine serving to disinfect water in a swimming bath. The chlorine is contained in cartridges arranged in successive stages in a conduit through which the current of water flows. The upstream end of each cartridge is open to expose the chlorine to the force of the water. The cartridges are supported in the conduit by transverse baffles which axially space the cartridges apart and also direct the current of water at the centre of the exposed chlorine. In one form of the device a single cartridge is provided at each stage, supported by a baffle having a central orifice. In another form two cartridges are provided at each stage, supported by a baffle having two orifices, the cartridges and the orifices being arranged symmetrical with respect to the axis of the conduit but the cartridges being disposed 90 DEG out-of-phase with the orifices. Each orifice may have a bush to assist in directing the current of water at a downstream cartridge.