July 1950 Issue [The Easy Chair] Research by air Download PDF Adjust Share by Bernard Augustine De Voto, This article is only available as a PDF to subscribers. Download PDF Tags 20th century A.B. (Alfred Bertram) Guthrie Aerial exploration Air pilots, Military Air travel Bernard Augustine De Voto Historians Historiography Northwestern States Oregon Trail United States More from Bernard Augustine De Voto Our friend alcohol Beating the Bali Ha’i racket Birth of an art Adjust Share