The marker off Ferring for the Littlehampton three-mile treated water outfall is about 3 miles from Goring. There is a well known oasis effect on hot days, where light is bent over the horizon because of temperature differences and you can see things at a distance as if they were very tall. What is a Barometer An instrument for measuring atmospheric pressure. The mercurial barometer consists of a mercury-filled glass tube that is sealed at one end and inverted in a cup of mercury. Pressure on the surface of the mercury in the cup supports the mercury in the tube, which varies in height depending on variations in atmospheric pressure.
Inches of mercury is a valid measure.
The aneroid barometer contains a sealed, partially evacuated metallic box. The higher the pressure, the more settled the weather. In summer, we have fair weather, in winter it is clear and cold, but with the possiblity of fog. If the pressure falls considerably, you can expect storms and strong winds. A slow, constant increase in air pressure indicates a settled peiod of dry, sunny weather, whereas a steady decrease indicates persistent bad weather.