Clair Patterson—20th Century Geologist
Hart-Parr gas tractor
Lead smelting furnace
Auto Gassing Up, ca. 1918-1922
Sectional and Geological Map of Iowa, 1856
Geologic Makeup of Iowa
Glaciers in Iowa
Auto Gassing Up, ca. 1918-1922
Time Frame: 1922
A man and a boy in an early automobile at a store that provided gasoline. State Center. ca. 1918-1922.
Photo courtesy of the Iowa Department of Transportation
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