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.
A man fixes a balloon onto a machine. Balloon inflates as hydrogen fills into it. Balloon release to forecast weather conditions and study cloud formation. Man looks through telescope of theodolite and records observations. Airplane and big Army balloon used to study cloud formation.
Clouds in he sky. Explains the process of cloud formation in the atmosphere by evaporation and condensation. Importance of cloud formation on weather as a whole.
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