This textbook is an attempt to present fundamental world relations and their simple derivatives in such form that they may be conceived as an entirety in a system of coordinated principles through geography and astronomy. Chapter I presents an introduction. Chapter II presents a psychological and a pedagogical view. Chapters III and IV present what the author considers the fundamentals of geography and astronomy presented from a specific physical point of view, that is, "off the earth." The remaining chapters are considered as a presentation of the simplest derivatives of objective reality accompanying- these fundamentals and are consequently proper subjects for mature minds. The consideration of these derivatives in the fullest sense of the word is obviously a contemplation of all possible world relations.