Question

The Fortin's barometer is generally used in meteorological stations as well as in laboratories and schools.Type 1 for true and 0 for false

Answer 1

In the Fortin's barometer, the level of mercury in the glass at the bottom of the barometer cistern is adjusted to a scale zero, known as the fiducial point, each time a reading is to be taken. The level of mercury in the column is then read against the scale, using a vernier adjustment for extra accuracy. Air is evacuated from the top of the tube of mercury and the lower end is fixed in the cistern containing the reservoir of mercury. The Fortin's barometer is simple to use as it has a clear easy-to-read linear scale. These barometers can be mounted on a wall or suitable pillar. Fortin's barometers can be moved without risk of damage but should always be carried flat or upside down.
An accurate Fortin's barometer measurement is often possible only when it has been calibrated to known pressure levels. The measurements should generally be taken at the same temperature. Hotter or colder conditions can skew readings, as mercury responds to these changes as well as the pressure.
The Fortin's barometer is generally used in meteorological stations as well as in laboratories and schools.
Below is the diagrammatic representation.