Steel mill at production in United States. Molten steel poured from the furnace into Bessemer converters. Men shovel coal in the furnace. Molten steel on a conveyor.
Aerial view of a river bank with trees on its sides in United States. Men dig trenches along a highway, a water tower.
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.
Two men punch each other at a ring to win a boxing bout during Congressional inspection tour in United States. Referee declares a man winner as policemen cheer.
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