[Untitled photo, possibly related to: New Idria, California. A birds-eye view of New Idria showing vicinity of the mine… https://www.rawpixel.com/image/12297358/photo-image-plant-sky-eyeFree Image from public domain licensePicket line in front of Mid-City Realty Company. Chicago, Illinois. Sourced from the Library of Congress. https://www.rawpixel.com/image/12286184/photo-image-person-baseball-roadFree Image from public domain licenseBus trip from Knoxville, Tennessee, to Washington, D.C. Knoxville, Tennessee. A mechanic working on a brake lining at the… https://www.rawpixel.com/image/12295370/photo-image-face-person-public-domainFree Image from public domain licensePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Noon in the "bean hole". Sourced… https://www.rawpixel.com/image/12289965/photo-image-face-hand-personFree Image from public domain licenseAt a rolling machine in the Washington Tinplate Company. Washington, Pennsylvania. Sourced from the Library of Congress. https://www.rawpixel.com/image/12278014/photo-image-person-technology-public-domainFree Image from public domain licenseFiremen's muster. Boothbay center, Maine. Volunteer fire companies compete for one hundred dollars to the company which can… https://www.rawpixel.com/image/12270027/photo-image-plant-hand-personFree Image from public domain license[Untitled photo, possibly related to: Packing company strike. Cambridge, Maryland]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12272434/photo-image-person-sky-public-domainFree Image from public domain license[Untitled photo, possibly related to: The Bessemers "blooming" at the Jones and Laughlin Steel Company in Aliquippa… https://www.rawpixel.com/image/12262781/photo-image-sky-smoke-lightFree Image from public domain licensePacking company strike. Cambridge, Maryland. Sourced from the Library of Congress. https://www.rawpixel.com/image/12272589/photo-image-person-road-public-domainFree Image from public domain license[Untitled photo, possibly related to: Bingham Canyon, Utah. Open-pit workings of the Utah Copper Company]. Sourced from the… https://www.rawpixel.com/image/12295463/photo-image-mountain-public-domain-natureFree Image from public domain licenseBingham Canyon, Utah. Huge dipper of a power shovel loading ore into a car at a mine of the Utah Copper Company. Sourced… https://www.rawpixel.com/image/12295831/photo-image-sky-public-domain-architectureFree Image from public domain license[Untitled photo, possibly related to: Aroostook potatoes of the Katahdin variety on one of the farms of the Woodman Potato… https://www.rawpixel.com/image/12274979/photo-image-plant-person-public-domainFree Image from public domain licenseNashville, Tennessee. Vultee Aircraft Company. The Vengeance (V72) bomber. Sourced from the Library of Congress. https://www.rawpixel.com/image/12287772/photo-image-cloud-frame-skyFree Image from public domain licenseEnsenada, Puerto Rico. Sugar mill or "central" of the South Puerto Rico Sugar Company. Sourced from the Library of Congress. https://www.rawpixel.com/image/12280081/photo-image-sky-smoke-public-domainFree Image from public domain licensePhelps Dodge refining company, El Paso, Texas. Charging sheets of copper, produced by electrolysis, into a reverbatory… https://www.rawpixel.com/image/12295443/photo-image-wood-public-domain-factoryFree Image from public domain license[Untitled photo, possibly related to: The Bessemers "blooming" at the Jones and Laughlin Steel Company in Aliquippa… https://www.rawpixel.com/image/12262600/photo-image-fire-sky-smokeFree Image from public domain license