Thermometer is an instrument for measuring temperature. Mercury
is the liquid used in the maximum thermometer which has a narrowed
passage called a constriction in the bow of the glass tube just
above the bulb. A minimum thermometer contains a liquid of low
density like alcohol.
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The thermograph is an instrument that records air temperature
on graph paper.
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Thermometer Shelter
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The atmospheric pressure on a given surface is the force
exerted per unit area by overlying column of air extending to the
outer limit of the atmosphere. Barometer is an instrument for
measuring atmospheric pressure.
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Two types of barometer: Mercurial BarometerAneroid
Barometer
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Wind vane is an instrument used to indicate wind direction
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Anemometer measures the wind speed and is normally made of cups
which are rotated by the motion of the wind.
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Aerovane indicates both the wind direction and wind speed or
simply the wind velocity in a remote wind indicator panel.
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is used to measure relative humidity. SLING-PSYCHOMETER
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is a hygrometer and thermograph combination and records both
relative humidity and temperature on a graph paper.
Hygrothermograph
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Hygrometer is an instrument used to measure the moisture
content of a gas, as in determining the relative humidity of
air.
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is any product of the condensation of atmospheric water vapor
that falls under gravity. The main forms of precipitation include
drizzle, rain, sleet, snow, graupel and hail. It occurs when a
local portion of the atmosphere becomes saturated with water vapour
and the water condenses.
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Local Action: Does It Make a Difference? Never doubt that a
small group of thoughtful, committed citizens can change the world;
indeed its the only thing that ever has. Margaret Mead.
