Explains how to read a barometer and interpret its meaning, as well as how the barometer was invented.

Explains different types of pressure, the characteristics of absolute and gauge pressure, and their differences and similarities.

Discusses the fronts and weather patterns associated with low pressure areas.

Describes the ways in which wind direction and barometric pressure can be used by the amateur weather forecaster to make predictions about the weather.

A calculator that computes air density if altitude, temperature, humidity, and barometric pressure are known.

Explains the different measurement units that are used in barometers and provides conversion tables.