This folder is from "Legal Records" file of the Sadie and Hampton George Papers (MS-00434)

This folder is from "Legal Records" file of the Sadie and Hampton George Papers (MS-00434)

The caption on the back of the image reads, " "Like grandfather, like father, like son" is an appropriate title for this photograph of Ray Lyman Wilbur II and Ray Lyman Wilbur III, reading the name of Ray Lyman Wilbur I on a bronze plaque at the Hoover Dam. As noted on the plaque, Ray Lyman Wilbur I was secretary of the Interior during President Hoover's administration and played a major role in administrative matters pertaining to the construction of Hoover Dam. His son and grandson, shown here, were visitors to the dam recently and were given a specially-conducted tour by the Bureau of Reclamation's guide service. The father and son reside at 1808 Indiana Street, Vallejo, California. The plaque is on the left hand side of the entrance to the Hoover Dam's Arizona elevator tower through which a third of a million visitors leave the dam and power plant each year following guided tours of this mammoth structure on the Colorado River between Nevada and Arizona. Guided tours of the dam and power plant, starting at the elevator tower on the Nevada side, are available daily to the public between the hours of 8 a.m. to 5 p.m. Ca. 1950's (Bureau of Reclamation photo)."

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.

This photograph has three images. The first one, (0272_0035) shows people high scaling Boulder Dam. The handwritten inscription reads, "The Blackbirds drilling holes for blasting. High scalers, tough job. No chance to sleep here unless you want a long nap. 'Blackie', the graveyard shifter, tells me when he was working the drill from a bo'sn chair. He caught a man who had fallen out of his chair. Had a little too much of on the rocks. Some did fall without any help." The second image (0272_0036) shows the last big blast at Boulder Dam. (Provided by U.S. Bureau of Reclamation) It reads, "Blasting walls of canyon for keyway." The third one (0272_0037) is a picture of Coffer dam at Boulder Dam. The inscription reads, "Steel beams pile driven, rock filled and covered with reinforced concrete. Note size of trucks (at this time, largest in the world) in front of largest 'drilling jumbo' in the world also. There's six working levels on each side for men to work from, and is forty ft. long. About fifty men, each with a tender, works on this jumbo."

This photograph has three images. The first one (0272_0056) reads, "See the river behind the dam. A heavy flow storming upriver, slot in middle of dam has gauges installed along to register heat generated by this pile of cement. Pipe strung along bottom of each pour on each level of the dam, ends in the slot. Each pipe at each level will be pumped with refrigerated water until each level has been cooled. Then the pipes will be pumped full of cement. They will then fill that 5 ft. height. If not cooled, would generate enough heat to explode." The second one (0272_0057) is upside-down, and it reads, "#8 hi-line with doors open; line is slack on doors. This line is called, by bell boy to operator, the load line. When full of mud this line carries the load. No.8 is now using single line, makes it faster and quieter." The third image (0272_0058) reads "No.8 and No.7 working off hi-trussel." The top arrow: hook tender, bottom arrow: donkey operator and his donkey - run by electricity." It also says, "No.8 using 4 yd. bucket to pour small forms on the face of the dam. Some forms become quite small as the slant of the dam shortens them at each height."

The old stamp mill, location unknown. A stamp mill (or stamp battery or stamping mill) is a type of mill machine that crushes material by pounding rather than grinding, either for further processing or for extraction of metallic ores. Breaking material down is a type of unit operation. A stamp mill consists of a set of heavy steel (iron-shod wood in some cases) stamps, loosely held vertically in a frame, in which the stamps can slide up and down. They are lifted by cams on a horizontal rotating shaft. On modern mills, the cam is arranged to lift the stamp from the side, so that it causes the stamp to rotate. This evens the wear on the shoe at the foot of the stamp. As the cam moves from under the stamp, the stamp falls onto the ore below, crushing the rock, and the lifting process is repeated at the next pass of the cam. Each one frame and stamp set is sometimes called a "battery" or, confusingly, a "stamp" and mills are sometimes categorized by how many stamps they have, i.e. a "10 stamp mill" has 10 sets. They usually are arranged linearly, but when a mill is enlarged, a new line of them may be constructed rather than extending the line. Abandoned mill sites (as documented by industrial archaeologists) will usually have linear rows of foundation sets as their most prominent visible feature as the overall apparatus can exceed 20 feet in height, requiring large foundations. Stamps are usually arranged in sets of five. Some ore processing applications used large quantities of water so some stamp mills are located near natural or artificial bodies of water. For example, the Redridge Steel Dam was built to supply stamp mills with process water.