Densities of solids and liquids. Anemometers.
Compressibility of liquids. Piezometer. Correction due to the compressibility of the solid envelop.
Gas. Expansibility. Other properties common to liquids and gases. Principle of the equal transmission of pressures in all directions. Weight of gases. Pressure due to weight (principle of Archimedes.) Weight of body in air and in vacuum. Aerostation.
Superposed liquids and gases.
Communicating vessels. Barometer.
Detailed construction of barometer. Barometers of Fortin, Gay-Lussac, Bunten. Indication of the corrections necessary.
Mariotte’s law. Regnault’s experiments.
Manometer with atmospheric air—with compressed air. Bourdon’s manometer.
Law of the mixture of gases.
Air pump. Condensing pump.