While physiographic processes and resulting land forms occupy a large place in geographical control, the earth in its simple mathematical aspects should be better understood than it generally is, and mathematical geography deserves a larger place in the literature of the subject than the few pages generally given to it in physical geographies and elementary astronomies. No one book treats the subject of mathematical geography with any degree of thoroughness. It is with the view of meeting the need for such a volume that this work has been published. Although designed for the use for teachers\\' preparation, an attempt has been made to keep its scope within the attainments of a student. This book contains additional explanation of the topics covered for better understanding of students as well as experimental works are suggested for the purpose of making the principles studied concrete and vivid. CONTENTS: 1. Introduction; 2. The Form of the Earth; 3. The Rotation of the Earth; 4. Longitude and Time; 5. Circumnavigation and Time; 6. The Earth\\'s Revolution; 7. Time and the Calendar; 8. Seasons; 9. Tides; 10. Map Projections; 11. The United States Government Land Survey; 12. Triangulation in Measurement and Survey; 13. The Earth in Space; 14. Historical Sketch; Appendix; Glossary; Index.