Pushing cotton seed onto conveyor. Cotton seed oil mill. McLennan County, Texas by Russell Lee https://www.rawpixel.com/image/12148209/image-person-art-vintageFree Image from public domain licenseAdkin collection : Untitled (14 January 1949) by Leslie Adkin. https://www.rawpixel.com/image/13029516/adkin-collection-untitled-14-january-1949-leslie-adkinFree Image from public domain licenseZaal 128 van het Rijksprentenkabinet (c. 1950 - c. 1955) by Rijksmuseum Afdeling Beeld https://www.rawpixel.com/image/13752064/photo-image-person-light-public-domainFree Image from public domain licenseMangahao Hydro-Electric scheme - 37th and 38th visits : 1924 (1924) by Leslie Adkin. https://www.rawpixel.com/image/13028668/image-person-water-clothingFree Image from public domain licenseUnderground tunnel from Underground, or Life Below the Surface. Incidents and Anecdotes Beyond the Light of Day, Startling… https://www.rawpixel.com/image/571487/underground-tunnel-workersFree Image from public domain licensePNG Drawing of an underground tunnel, transparent background https://www.rawpixel.com/image/572291/png-drawing-underground-tunnel-transparent-backgroundView licenseTimbered tunnel leading into mine. San Juan County, Colorado. Barren mountain sides attest to the amounts of timber which… https://www.rawpixel.com/image/12148869/image-person-art-patternFree Image from public domain licensePlatform at entrance to tunnel. The gold ore taken from the tunnel requires a built-up platform at the entrance to… https://www.rawpixel.com/image/12148891/image-plant-art-vintageFree Image from public domain licenseOne of the traveling towers which connects with the central tower from which material for Shasta Dam is transported. Shasta… https://www.rawpixel.com/image/12149659/image-art-vintage-roadFree Image from public domain license[Untitled photo, possibly related to: Platform at entrance to tunnel. The gold ore taken from the tunnel requires a built-up… https://www.rawpixel.com/image/12150659/image-plant-art-skyFree Image from public domain licenseAlcoholic Homeless Holding Liquor Bottle https://www.rawpixel.com/image/9507/premium-photo-image-addict-addicted-alcoholView licenseAdult man smiling studio portrait https://www.rawpixel.com/image/190622/premium-photo-image-adult-background-bare-chestView licenseTruck which carries bulk wheat in entrance to private elevator. Touchet, Walla Walla County, Washington by Russell Lee https://www.rawpixel.com/image/12151415/image-person-art-vintageFree Image from public domain license[Untitled photo, possibly related to: workers on Newport News Homesteads, Virginia]. Sourced from the Library of Congress. https://www.rawpixel.com/image/12258328/photo-image-person-light-public-domainFree Image from public domain licenseTunnels dug into the sides of the banks of the San Miquel River in search for gold. San Miquel County, Colorado by Russell… https://www.rawpixel.com/image/12148887/image-plant-art-vintageFree Image from public domain licenseMany miles of the Southern Pacific railroad had to be enrouted and new tunnels and track constructed to take care of… https://www.rawpixel.com/image/12149406/image-plant-art-vintageFree Image from public domain licenseAlcoholic Homeless Holding Liquor Bottle https://www.rawpixel.com/image/9537/premium-photo-image-addict-addicted-addictionView licenseMan Walk Hopeless Up the Ramp https://www.rawpixel.com/image/9525/premium-photo-image-alone-caucasian-darkView licenseMan Sitting Hopeless on The Floor https://www.rawpixel.com/image/9417/premium-photo-image-homeless-alone-caucasianView license