Description given with photograph: "Howard Hughes in New York after making a high altitude flight from Los Angeles during which he tested a new two-ounce oxygen mask."

A diagram of Hughes' record-making Lockheed Plane. Typed on a piece of paper included with the image:"Pictured above is a diagram showing the construction and the special features of the Lockheed 14 monoplane in which Howard Hughes and his picked crew of four made their record flight from New York City to Paris, France, on their dash around the world. Credit line (Aero Digest from ACME) 7/11/1938."

A view of the first passenger plane equipped with radar that Howard Hughes is flying in Culver City, California.

The black and white view of the Lockheed 14 aircraft in Minneapolis, Minnesota. Description written on back of photograph: "World-fame drops on City out of blue, sunny skies: Fame came to the municipal airport and the city of Minneapolis in a flash of silver and a roar at 7:38 am, July 14, 1938 when Howard Hughes swooped to Earth in his Droning Silver Bullet on his record breaking round-the-world flight. Photo-courtesy "The Minneapolis Star" Board of Park Commissions. 325 City Hall Minneapolis Minn."

Typed onto a piece of paper attached to the image: "As Hughes Visited Washington To Thank Cordell Hull, Washing, D. C. -- Police escorting Howard Hughes holding hat, through the admiring throungs at the Washington Airport as the intrepid flyer and his four companions on his Round-The-World flight came to the Capital, July 21st, to personally thank Secretary of State Cordell Hull for his cooperation in clearing their take-offs on their flight. Credit Line (ACME) 7/21/38."

A view of Howard Hughes installing a radar safety system for passenger planes in Culver City, California.

A view of Howard Hughes installing a radar safety system for passenger planes in Culver City, California.