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CIRCA 1920s - Coal is pulverized and then blended at a gas plant in NYC in the 1920s.
CIRCA 1920s - The gas is pumped through purifiers at a gas plant in the 1920s.
CIRCA 1920s - Silent 1920s era science film showing what happens when air is pumped and put under pressure.
CIRCA 1920s _- A rendering that demonstrates the creation of coal beds.
CIRCA 1920s - A rendering that demonstrates the creation of coal beds.
A large number of people work in an office gathering collection taxes for underprivileged people in the 1960s. (1960s)
The gas is pumped through purifiers at a gas plant in the 1920s. (1920s)

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18443365

Stock Video ID: 18443365

Coal is pulverized and then blended at a gas plant in NYC in the 1920s. (1920s)

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