low pressure

“An approaching low pressure system in the atmosphere would make the “glass fall,” i.e, the barometric pressure gauge a column of mercury in a thin glass tube dip to a low level, appropriately marked on the barometer’s face as “stormy weather.””

Simon & Schuster: John Paul Jones

“The constant low pressure over the vast sheets of ice sucked moisture from the air, allowing little snow to fall in periglacial regions and creating a constant wind.”

The Clan of the Cave Bear

“Further, it became apparent in the first two decades of the century that the economy of high pressure steam engines could be increased considerably above that of low pressure en gines.”

TECHNOLOGY