Yamazaki had spent one entire morning attempting to diagram the sewage-collection arrangements for the group of dwellings he thought of as comprising Skinner’s "neighborhood." Widespread use of transparent five-inch hose had made this quite exciting, like some game devised for children, as he’d tried to follow the course of a given bolus of waste from one dwelling down past the next. The hoses swooped down through the superstructure in graceful random arcs, bundled like ganglia, to meet below the lower deck in a thousand-gallon holding tank. When this was full to capacity, Skinner had explained, a mercury-switch in a float-ball triggered a jet-pump, forcing the accumulated sewage into a three-foot pipe that carried it into the municipal system.