Scientific instruments used for weather forecast. Wind vane shows the direction of wind blow. An anemometer indicates speed of the wind.
Scientific instruments used for weather forecast. Thermometers used to record maximum and minimum temperatures. A man notes down the temperatures. Wet and dry bulbs of thermometers used to record humidity level.
Scientific instruments used for weather forecast at a weather bureau in United States. A man uses a barometer to record atmospheric pressure.
Scientific instruments used for weather forecast at a weather bureau in United States. A thermograph shows an increase and decrease in the temperature.
Scientific instruments used for weather forecast at a weather bureau in United States. A man takes out water from a rain gauge into a tumbler and measures the amount of rainfall with a scale. He records the data.
Over cast sky. Conditions in upper atmosphere exert an influence on weather conditions.
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