The bones of a knee joint of a boy, viewed through x-ray. Photoprint from radiograph after Sir Arthur Schuster, 1896. https://www.rawpixel.com/image/13997279/photo-image-face-shadow-personFree Image from public domain licenseBones of the ankle, and part of the foot and leg. Radiograph, 1900/1904. https://www.rawpixel.com/image/13999668/bones-the-ankle-and-part-the-foot-and-leg-radiograph-19001904Free Image from public domain licenseFreight train operations on the Chicago and Northwestern Railroad between Chicago and Clinton, Iowa. Riding in the caboose… https://www.rawpixel.com/image/12291360/photo-image-frame-light-public-domainFree Image from public domain license[Untitled photo, possibly related to: Tapping a furnace at the foundry of the Farrell-Binmingham Company, Ansonia… https://www.rawpixel.com/image/12262411/photo-image-face-person-lightFree Image from public domain license[Untitled photo, possibly related to: Tapping a furnace at the foundry of the Farrell-Binmingham Company, Ansonia… https://www.rawpixel.com/image/12262508/photo-image-person-light-technologyFree Image from public domain license[Untitled photo, possibly related to: Curtis, Oklahoma. Helper engine leaving the train on Atchison, Topeka, and Santa Fe… https://www.rawpixel.com/image/12290125/photo-image-frame-smoke-lightFree Image from public domain licenseRear brakeman M. H. Burdette, watching the train from his window in the cupola on the Atchison, Topeka and Santa Fe… https://www.rawpixel.com/image/12289815/photo-image-face-person-shirtFree Image from public domain license[Untitled photo, possibly related to: Kiowa, Kansas. Engineer B. F. Hale in the cab of his engine on the Atchison, Topeka… https://www.rawpixel.com/image/12291506/photo-image-frame-person-public-domainFree Image from public domain license