The book, an English translation of which is here republished, was first issued in Germany in 1845. The author, at that time, was young, twenty-four years of age, and his production bears the stamp of his youth with its good and its faulty features, of neither of which he feels ashamed. It was translated into English, in 1885, by an American lady, Mrs. F. Kelley Wischnewetzky, and published in the following year in New York. The American edition being as good as exhausted, and having never been extensively circulated on this side of the Atlantic, the present English copyright edition is brought out with the full consent of all parties interested. For the American edition, a new Preface and an Appendix were written in English by the author. The first had little to do with the book itself; it discussed the American Working-Class Movement of the day, and is, therefore, here omitted as irrelevant, the second-the original preface-is largely made use of in the present introductory remarks.