《The National Geographic Magazine Vol. 08 - 09. September 1897》 - 免费有声读物

The National Geographic Magazine, an illustrated monthly, the September Number.
It includes the following articles:

• Modification of the Great Lakes by Earth Movement, by G. K. Gilbert
• The Toronto Meeting of the British Association for the Advancement of Science
• The Great Unmapped Areas of the Earth's Surface Awaiting the Explorer and Geographer, by J. Scott Keltie
• The Compass in Modern Navigation, by G. W. Littlehales