The volume titled Mathematical Geography by Willis E. Johnson addresses the greatly awakened interest in common-school subjects during recent years, with geography receiving a large share of this attention. While physiographic processes and resulting land forms occupy a large place in geographical control, the book highlights the necessity for a better understanding of the earth in its simple mathematical aspects, asserting that mathematical geography deserves a larger place in the literature than the few pages generally allotted to it in physical geographies and elementary astronomies. It is widely acknowledged that the mathematical portion of geography is the most difficult, the most poorly taught, and the least understood, and that the subject matter is scattered about in many works. This volume was thus undertaken with the view of meeting the need for a single, comprehensive book that treats the subject with thoroughness. It aims to provide students with the foundational principles required for advanced studies in college courses such as physiography, meteorology, and commerce, reflecting the growing appreciation for the subject’s importance across various educational institutions.