Ohio State Exhibit - A Century of Progress International Exposition brochure (page 10 b)

Oil, one of a set of fifteen murals by William Mark Young, shown and described in a brochure published to accompany the Ohio State Exhibit at the 1933 A Century of Progress International Exhibition (aka "Chicago World's Fair"). The murals were subsequently relocated to the Ohio Statehouse.
The accompanying description reads: "The romance of the oil industry is linked with Ohio's early history and we illustrate in this mural the first American use of petroleum.

The early Indians found this oil useful for medicinal purposes and obtained it by absorbing the oil from the surface of ponds, etc., with blankets. From this simple beginning has grown the mammoth industry shown by the modern oil wells in the haze above. "