Description given with photograph: "'Silver Spike celebration at Boulder Junction, south of Las Vegas, where Boulder City branch leaves UPRR mainline, ca. 1932 or earlier' -Dave Coons"
A black and image image of four men, including a 75-year-old identified as Sam Jones, distributing water in an area known as Ragtown near the Hoover Dam construction site at Black Canyon, not far from Boulder City.
Description given with photo: "Hughes Pilots Radar-Equipped Plane Culver City, Calif. -- First passenger plane equipped with radar is flown in demonstration May 1st by Howard Hughes (left) and co-pilot R.C. Loomis over Culver City. Pilots using this equipment will be warned of approaching obstacles by lights flashing on radar panel. Two lights (lefts) with 2,000-foot range, are used to guarantee clearance over mountains; two lights (right) with 500-foot range, are a safety device for approaches and landings. Either set of lights warns against approaching aircraft. Trans-World Airline plans to install radar on its passenger planes. Credit (ACME) 5-3-47."