Atmospheric Electricity. Positive potential in atmosphere that gives rise to electrical phenomena when coupled with negative potential on surface of Earth.
Atmospheric Pressure. Set up by weight of overlying air. At Earth's surface it is equivalent to about 14 ½ Ib. per sq. in. In meteorology, usually expressed in millibars.
Atmospherics.Crackling noises that interfere with radio reception.
Atmospheric Sounder. Instrument by which sea depth is measured by increased water pressure compressing air in a small bore tube that is carried down by lead or sinker.
