Definition

Instrument for measuring atmospheric pressure; falling barometer indicates onset of low pressure and likelihood of foul weather. Midpoint on a barometric scale is either 30 inches (of standing mercury) or 1013 millibars

Related Images

external image equip0_barometer_0000.jpg
Aneroid (without liquid) barometer, with 1013 millibars representing midpoint of likely pressure variations recorded
Image ID: 807

Record ID: 135