[Untitled photo, possibly related to: Eugene Davis, gold prospector, operating "rocker". Rocks and sticks remain in the… https://www.rawpixel.com/image/12169706/image-person-art-vintageFree Image from public domain licenseEugene Davis, gold prospector, operating "rocker". Rocks and sticks remain in the screened box at the top when water is… https://www.rawpixel.com/image/12169489/image-person-art-vintageFree Image from public domain licenseActivity at oil well; man on lengths of traveling block will be pulled up to the crown block at top of derrick, Kilgore… https://www.rawpixel.com/image/12171009/image-person-art-skyFree Image from public domain licenseTractor from top of attached jayhawk. Kimberley farm, Jasper County, Iowa. Sourced from the Library of Congress. https://www.rawpixel.com/image/12272727/photo-image-person-public-domain-natureFree Image from public domain license