"Psychology: an elementary text-book" by Hermann Ebbinghaus is a scientific publication written in the early 20th century. This work serves as a foundational text for college students and general readers interested in psychology and covers essential topics regarding the relationship between brain and mind, as well as the mechanisms of various mental processes. The book aims to present a clear and concise understanding of psychological phenomena and the fundamental principles underlying them. The opening of the text includes a translator's preface that outlines the aims and structure of the book, emphasizing its utility as an introductory resource in psychology. The introduction presents a historical overview of psychology, discussing its development from ancient philosophical thought to modern scientific approaches. Ebbinghaus addresses the challenges faced in the scientific study of psychology, highlighting the complexity of mental processes and their intricate connection to the nervous system. This sets the stage for an in-depth discussion of general psychology, including the anatomy of the nervous system and its correlation to consciousness and mental functions. (This is an automatically generated summary.)