Back of Stills, Clark & Sumner, Standard Petroleum Refinery, Pittsburg, Pennsylvania c. 1865

"Back of Stills, Clark & Sumner, Standard Petroleum Refinery, Pittsburg, Pennsylvania" is a stereoscopic photograph by Thomas H. Johnson, taken circa 1865. It captures a moment at the back of a petroleum refinery, showcasing workers, barrels, and intricate pipes, highlighting the burgeoning oil industry in Pittsburgh during the mid-19th century. The photograph offers a glimpse into the industrial landscape of the time, capturing the details of the process and the men working diligently. Stereoscopic photographs were popular in the 19th century for their ability to create a three-dimensional effect, further enhancing the viewer's immersion in the industrial scene.