Basement room of Boulder Dam Museum, showing a stairway and basement door in the southwest corner of the room.

Basement museum room, looking north, showing north corner of room. Boxes of materials are seen near the entrance doorway as light shines in from the windows.

Typed onto a piece of paper attached to the image: "As Los Angeles Welcomed Howard Hughes Home, Los Angeles, Cal. --- Governor Frank Merriam, Howard Hughes, and Mayor Frank L. Shaw (left to right) as they rode through the crowd-packed streets of Los Angeles during the reception -- one of the greatest and wildest the city had ever seen -- as Hughes and his four daring companions on his World-Flight arrived in the city. Credit Line (ACME). 8/2/38."

A view of crowds and the press at a parade for Howard Hughes celebrating the flyer's completion of his Round-The-World trip in Chicago.

The exterior of Hughes Research Laboratories where rock bits were test-drilled in Culver City, California in the 1940s. Transcribed from note taped to back of photo: "Rock bits are test-drilled in the laboratory under conditions that duplicate, as far as is possible in the laboratory, those encountered in actual drilling. As a result, rotational speeds, loads, and fluid volume are closely controlled. The rig operator occupies a splash-proof booth above the 'cellar floor.' The instruments on his control panel provide for application and measurement of variable axial loading on the drilling bit up to 100,000 lbs., variable rotational speeds up to 400 rpm, measurement of bit penetration over a total vertical travel of 5 feet at rates up to 180 ft. per hour, and torque. On the panel, also, are several controls for the operation of mud pump and other accessory equipment."

A view of Howard Hughes emerging from the Lockheed 14 aircraft after landing it in Chicago.