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"Barometer, an instrument for measuring the pressure of the atmosphere, based on an experiment performed in 1643 by Torricelli, a pupil of Galileo." -Foster, 1921

Barometer

"Barometer, an instrument for measuring the pressure of the atmosphere, based on an experiment performed…

The barometer is used to measure atmospheric pressure.

Barometer

The barometer is used to measure atmospheric pressure.

The aneroid barometer measures atmospheric pressure on a dial.

Aneroid Barometer

The aneroid barometer measures atmospheric pressure on a dial.

The liquid barometer is an instrument used in measuring atmospheric pressure. The liquid barometer uses a method of water rather than a dial with the aneroid barometer.

Liquid Barometer

The liquid barometer is an instrument used in measuring atmospheric pressure. The liquid barometer uses…

An instrument used for indicating changes in atmospheric pressure.

Baroscope

An instrument used for indicating changes in atmospheric pressure.

Magdeburg Hemispheres. This model is used to show that atmospheric pressure is equal in all directions. It was invented by Otto Von Guericke, of Magdeburg - hence the name.

Magdeburg Hemispheres

Magdeburg Hemispheres. This model is used to show that atmospheric pressure is equal in all directions.…

A baroscope, which is a version of the barometer. It measures atmospheric pressure.

Pressure

A baroscope, which is a version of the barometer. It measures atmospheric pressure.

"The shaft A and B is attached to tubes, C. When the crank is turned, centrifugal force in the tubes draws the water up and into the circular trough, D. The water then collects and discharges out at E." —Quackenbos 1859

Centrifugal Pump

"The shaft A and B is attached to tubes, C. When the crank is turned, centrifugal force in the tubes…