Transcribed from press release attached to back of photo: "PENETRATES EARTH 16,000 FEET A surface approaching the hardness of the diamond is applied by a new atomic-hydrogen welding process to the teeth of a rock bit drill at the Hughes Tool Company plant in Houston, Texas, owned by Howard Hughes, noted aircraft designer-flyer. The first Hughes rock bit revolutionized oil drilling practices in this nation several decades ago, making possible recovery of oil beneath hard rock formations at great depths. Most recent models have penetrated the earth below 16,000 feet. Hughes drills are used in 50 foreign countries. NOTE: The atomic-hydrogen process differs from other arc-welding processes in that the arc is formed between two electrodes, rather than one electrode and the work." The patent on the atomic-hydrogen process was awarded October 29, 1929.

Boulder City, panorama of houses, view from the water tank. From this angle, building such as City Hall (left), the Boulder Theater building that contained the Boulder Dam Service Bureau (center), the Boulder Dam Hotel (right), and the Boulder Cafe/ Union Bus Terminal building (right) can be seen.

From the Morgan Sweeney Photograph Collection (PH-00228). Aerial View of Boulder City, Nevada, looking west in 1955?

Group photograph of Boulder City (Nevada) Elementary School teachers and faculty. Front row, L-R: unknown woman, Emma Wood, Cecelia Thomas, Dorothy Johnson, Mabel Arnold, Edna French, Mae Hale. Second row: Nell Jones, Merle Lyon, Catherine Keese, Addie Heddens, Ada Robeson, Eileen Conners, Marian Sutherland, Paula Donlin. Third row: Andrew Mitchell, Lee Norman, Cal Smith, unknown woman, Evelyn Childress, unknown woman, Violet Muchow, Catherine Willis, Louise Newell, Marge Wallon, Virginia Arp, Thelma Parmelee, Neosha Norman, Rebecca Nalley.

Boulder City, panorama of houses, view from the water tank. The Boulder Dam Hotel can be seen in the center of the image.