[Untitled photo, possibly related to: Old station on narrow gauge railroad in ghost mining town. Silver Plume, Colorado].… https://www.rawpixel.com/image/12336419/image-plant-sky-mountainFree Image from public domain licenseHome of Mr. and Mrs. George Callahan, whose husband works at Hartford Linen Supply. They have four children and have always… https://www.rawpixel.com/image/12247570/photo-image-public-domain-hospital-childrenFree Image from public domain licenseWheel barometer from The Colliery Manager's Handbook... Fourth Edition, Revised And Enlarged published by Crosby Lockwood &… https://www.rawpixel.com/image/572414/machine-barometer-vintage-drawingFree Image from public domain license[Untitled photo, possibly related to: Caboose of the Rio Grande Southern narrow gauge railway. Telluride, Colorado] by… https://www.rawpixel.com/image/12150584/image-plant-person-artFree Image from public domain licenseClock and sign in tavern. Smuggler's Notch, Vermont. Sourced from the Library of Congress. https://www.rawpixel.com/image/12272308/photo-image-public-domain-circle-shapeFree Image from public domain license[Untitled photo, possibly related to: Milk-testing is one way of gauging the value of different feeding practices. As the… https://www.rawpixel.com/image/12276992/photo-image-face-plant-personFree Image from public domain licenseFlat cars of narrow gauge railroad loaded with logs from the surrounding mountains. Baker County, Oregon by Russell Lee https://www.rawpixel.com/image/12174208/image-plant-person-artFree Image from public domain licenseIden, New Mexico. Section gang raising, surfacing and gauging the track in the Atchison, Topeka and Santa Fe Railroad… https://www.rawpixel.com/image/12294079/photo-image-people-sky-public-domainFree Image from public domain licenseDriving herd of fat lambs into corrals along the narrow gauge railroad. Cimarron, Colorado by Russell Lee https://www.rawpixel.com/image/12149084/image-dog-plant-personFree Image from public domain licenseMilk-testing is one way of gauging the value of different feeding practices. As the milk tester for the Triple B Association… https://www.rawpixel.com/image/12275538/photo-image-face-plant-personFree Image from public domain licenseAerial tram leading from mine to loading platform at narrow gauge railway station. Ophir, Colorado by Russell Lee https://www.rawpixel.com/image/12148690/image-plant-art-skyFree Image from public domain license[Untitled photo, possibly related to: Iden, New Mexico. Section gang raising, surfacing and gauging the track in the… https://www.rawpixel.com/image/12292502/photo-image-person-sky-public-domainFree Image from public domain licenseIden, New Mexico. Section gang raising, surfacing and gauging the track in the Atchison, Topeka and Santa Fe Railroad yard.… https://www.rawpixel.com/image/12292247/photo-image-face-person-skyFree Image from public domain licenseNarrow gauge railway yards, train and water tank at Telluride, Colorado by Russell Lee https://www.rawpixel.com/image/12149039/image-plant-person-artFree Image from public domain licenseDetail of the controls in the pilot house of the towboat Ernest T. Weir going down the Ohio River to Cincinnati. Sourced… https://www.rawpixel.com/image/12296453/photo-image-person-technology-public-domainFree Image from public domain license[Untitled photo, possibly related to: Washington, D.C. Conversion of the Shoreham Hotel furnace from oil to coal burning… https://www.rawpixel.com/image/12297296/photo-image-technology-public-domain-clockFree Image from public domain licenseRailroad station and liquor store at Ophir, Colorado. A narrow gauge railway runs into the town with supplies and takes out… https://www.rawpixel.com/image/12150311/image-plant-person-artFree Image from public domain licenseRailroad station of the D.& R.G.W. Railroad at Ouray, Colorado. This narrow gauge line formerly had passenger service but… https://www.rawpixel.com/image/12148892/image-plant-art-vintageFree Image from public domain licenseDetail of the controls in the pilot house of the towboat Ernest T. Weir going down the Ohio River to Cincinnati. Sourced… https://www.rawpixel.com/image/12295087/photo-image-person-public-domain-houseFree Image from public domain licenseConductor (right) and brakeman, in their places in the cupola of the caboose on the Atchison, Topeka, and Santa Fe Railroad… https://www.rawpixel.com/image/12290311/photo-image-person-public-domain-wallFree Image from public domain licenseCaboose of the Rio Grande Southern narrow gauge railway. Telluride, Colorado by Russell Lee https://www.rawpixel.com/image/12150583/image-person-art-vintageFree Image from public domain license[Untitled photo, possibly related to: Conductor (right) and brakeman, in their places in the cupola of the caboose on the… https://www.rawpixel.com/image/12291266/photo-image-person-public-domain-wallFree Image from public domain license[Untitled photo, possibly related to: Narrow gauge railway yards, train and water tank at Telluride, Colorado] by Russell Lee https://www.rawpixel.com/image/12150242/image-plant-art-skyFree Image from public domain license[Untitled photo, possibly related to: Washington, D.C. Conversion of the Shoreham Hotel furnace from oil to coal burning… https://www.rawpixel.com/image/12297292/photo-image-technology-public-domain-clockFree Image from public domain licenseWashington, D.C. Conversion of the Shoreham Hotel furnace from oil to coal burning system. Sourced from the Library of… https://www.rawpixel.com/image/12297553/photo-image-technology-public-domain-circleFree Image from public domain licenseFreight operations on the Indiana Harbor Belt railroad between Chicago, Illinois and Hammond, Indiana. The conductor's work… https://www.rawpixel.com/image/12291347/photo-image-living-room-public-domain-wallFree Image from public domain licenseRailroad station of the D.& R.G.W. Railroad at Ouray, Colorado. This narrow gauge line formerly had passenger service but… https://www.rawpixel.com/image/12149096/image-plant-person-artFree Image from public domain licenseLititz, Pennsylvania. Gauge inspectors at the Animal Trap Company. Right front is Mrs. Julian Bachman, twenty-three, whose… https://www.rawpixel.com/image/12291805/photo-image-person-music-technologyFree Image from public domain license