This map depicts the corridor for flight navigation between Washington, D.C., and New York, New York. It includes major urban areas, roads,... Show moreThis map depicts the corridor for flight navigation between Washington, D.C., and New York, New York. It includes major urban areas, roads, railroads, etc., and the location of airfields, sea-plane landings, and navigation beacons. Apparently produced by the Engineer Reproduction Plant, Corps of Engineers, under the direction of the Airways Section, Office Chief of Air Corps in 1923, and apparently reissued in 1929. Show less