Howard Hughes and Noah Dietrich (the chief Executive Officer of the Howard Hughes Corporation from 1925-1957), during a dinner in Houston honoring Hughes' world flight.
James Howard "Dutch" Kindelberger (President and General Manager of North American Aviation), Larsen Warren, and Noah Dietrich seated at a banquet table.
Howard Hughes is sitting on the ground examining an architectural drawing of the Hughes Culver City plant. There is a section on "Intake Duct Body Plan."
Transcribed from attached press release: "HUGHES ROCK BIT TEST In a block-long laboratory at Houston, Texas, the Hughes Tool Company can simulate oil drilling conditions anywhere in the world. Here a Hughes bit is tested on a hard formation. Howard Hughes' father invented the rock bit in 1908 and the resulting business became the cornerstone on which Howard Hughes built his fabulous industrial empire in motion pictures, air transportation, aeronautical research and design, aircraft manufacture, electronics, armament and brewing."