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- World War I Poster, "Uncle Sam Needs that Extra Shovelful," circa 1917 - Coal fueled American industry in the early 20th century -- which meant that it also fueled much of the country's military effort during World War I. This poster, issued by the United States Fuel Administration about 1917, encouraged factory workers to conserve coal when firing boilers for steam-powered machinery.

- circa 1917
- Collections - Artifact
World War I Poster, "Uncle Sam Needs that Extra Shovelful," circa 1917
Coal fueled American industry in the early 20th century -- which meant that it also fueled much of the country's military effort during World War I. This poster, issued by the United States Fuel Administration about 1917, encouraged factory workers to conserve coal when firing boilers for steam-powered machinery.