National Geographic November 1931

In Humboldt’s Wake: Narrative of a National Geographic Society Expedition Up the Orinoco and Through the Strange Casiquiare Canal to Amazonian Waters
As guests of the Venezuelan government, a Society- sponsored team sails the Orinoco River, the third largest waterway in South America, to investigate the flora and fauna on the Brazil- Venezuela border.
Washington Through the Years: On Rolling Wooded Hills and Colonial Tobacco Fields, Where George Washington Dreamed Our Nation’s Great Capital, His Gorgeous Vision Comes True
Society President Gilbert H. Grosvenor presents a colorful and comprehensive picture of how Washington, D. C. honors its architectural heritage.