Barometers are scientific instruments that measure the pressure of the atmosphere in millibars. The range of pressure on Earth is 980-1050 mb. If a drop in pressure is usually an indication that precipitation is on its way, for which city would rain be predicted? Barometric Pressure (mb) Sat Sun Greensboro 990 996 998 Enfield 1027 1035 1026​

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.