Parris Island, South Carolina. Tactical formations of barrage balloons prevent dive bombing and the strafing of important… https://www.rawpixel.com/image/12289172/photo-image-plant-person-skyFree Image from public domain license[Untitled photo, possibly related to: Parris Island, South Carolina. Tactical formations of barrage balloons prevent dive… https://www.rawpixel.com/image/12289046/photo-image-plant-person-skyFree Image from public domain licenseWest Mine, West Frankfort, Illinois. Now abandoned. This mine has been down about a year. General caption: Many of the… https://www.rawpixel.com/image/12272660/photo-image-sky-technology-public-domainFree Image from public domain license[Untitled photo, possibly related to: Aerial tramway leaving from mine in distance to the mill. Because of the… https://www.rawpixel.com/image/12149109/image-plant-art-skyFree Image from public domain license[Untitled photo, possibly related to: The old method of drawing a combine; ten or more horses were used. Box Elder County… https://www.rawpixel.com/image/12150030/image-plant-person-artFree Image from public domain licensePouring seed into box of two-row tractor corn planter. Listing method. Monona County, Iowa. Sourced from the Library of… https://www.rawpixel.com/image/12284146/photo-image-plant-person-grassFree Image from public domain licenseDiscussing the method of planting strawberry bushes to prevent gulley erosion. Falls City Farmsteads, Nebraska. Sourced from… https://www.rawpixel.com/image/12267253/photo-image-people-strawberry-skyFree Image from public domain licenseCranking tractor while planting corn. Listing method. Monona County, Iowa. Sourced from the Library of Congress. https://www.rawpixel.com/image/12284165/photo-image-plant-person-public-domainFree Image from public domain licenseBethlehem-Fairfield shipyards, Baltimore, Maryland. Method of attaching steel sections. Sourced from the Library of Congress. https://www.rawpixel.com/image/12292901/photo-image-sky-public-domain-architectureFree Image from public domain licenseWashington, D.C. Foreign students at the International student assembly recording short talks in their native language, to… https://www.rawpixel.com/image/12288855/photo-image-person-shirt-technologyFree Image from public domain license