Arrangement note: Series I. Demonstrations, Subseries I.B. Other Demonstrations and Strikes

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."

'Entered according to Act of Congress in the year 1855 by J.H. Colton & Co. in the Clerk's Office of the Dist. Court of the U.S. for the South'n. Dist. of New York.' Scale [ca. 1:4,752,000. 1 in. to approx. 75 miles] (W 120°--W 102°/N 43°--N 32°). Shows natural features, and populated places, wagon route, proposed railroad routes and explorers' routes. Relief shown by hachures. Prime meridians: Greenwich and Washington.Hand colored. Atlas p. number in lower-right margin: 51. Decorative border. J.H. Colton & Co.