Black and white image of the gravel testing laboratory at the site of the former Stewart Ranch, also known as the Las Vegas Ranch. Site Name: Las Vegas Ranch (Las Vegas, Nev.)

Black and white image of the gravel testing laboratory at the site of the former Stewart Ranch, also known as the Las Vegas Ranch. Standing in the center is Henry Wieking, "setting window and door casements preparatory to rebuilding adobe walls." Site Name: Las Vegas Ranch (Las Vegas, Nev.)

Black and white image with the following printed description: Airplane motor propelled boat used in photographic survey of Colorado River between dam and Jumbo Wash.

Black and white image with the following printed description: View of Lake Mead, boat docks and bathing beach, showing development by National Park Service of area for bathing and picnicking.

Black and white image with the following printed description: Visit of Secretary Wilbur and party to Black Canyon Damsite. Party at St. Thomas, Nevada.

Black and white image showing an interior view of the Uptown Hardware Store.

Black and white image of an abandoned steam tractor. Description from Special Collections accompanying image: "According to the story told, this was one of the first three tractors ever built. One was shipped here to Eldorado Canyon to move ore and one was shipped to Death Valley for the Borax works (it is still in Death Valley). The other one was sent to South America to a mine. The one in Death Valley supposedly worked out fairly well being used mostly in sand. This one, it is told, was not too successful. The drive mechanism was by way of teeth on the inside of the big black wheels, driven by a pinion gear at the top. Small stones fell into the wheel and stuck in the grease necessitating frequent stops to remove the stones. The driver stood on a platform at the rear. May 1947."