Sách nói: National Geographic Magazine Vol. 10 - 07. July 1899

The National Geographic Magazine, an illustrated monthly, Vol X, July 1899.
It includes the following articles:

• Physiography of the Nicaragua Canal Route by C. Willard Hayes
• Nicaragua and the Isthmian Routes by A. P. Davis
• The Wellman Polar Expedition by J. Howard Gore
• The Coast and Geodetic Survey: its present work by E. D. Preston
• Exploration in Alaska
• Meteorology in the Philippines
• The Mission of the Diana

along with Geographic Literature and Miscellanea