A currency handling system comprising a fitness detector. The battery cell units are configured to define converging air flow spaces therebetween. , molybdenum, at high concentration, a component of a Group VIII metal, e. Water or waste cleaning fluid or a combination of both is poured into the container through the fill cap, so that it fills the container reservoir around the underside and sides of the toilet bowl element. Analysing means determines a fault location in the network system from the distribution of counts in the counters. An inflatable cover is coupled to the boat seat housing and defines a pressurizable interior.