Linked from
The 18 pages that link to Barometer, each with the reason it gives.
PressureRelated: Barometers turn atmospheric pressure into a measurable height or sensor reading.
HydrostaticsRelated: Liquid-column barometers determine air pressure through hydrostatic balance.
Robert FitzRoyRelated: Pressure readings informed FitzRoy’s assessment of approaching storms.
Buys Ballot's lawRelated: Pressure readings supplied the comparison needed to formulate the rule.