The early works, 1882-1898

v. 1. 1882-1888. Early essays and Leibniz's new essays concerning the human understanding.

v. 2. 1887. Psychology.

3. 1889-1892. Early essays and Outlines of a critical theory of ethics.

4. 1893-1894. Early essays and The study of Ethics, a syllabus.

5. 1895-1898. Early essays.

v. 1. 1882-1888. Early essays and Leibniz's new essays concerning the human understanding

v. 2. 1887. Psychology

v. 3. 1889-1892. Early essays and outlines of a critical theory of ethics

v. 4. 1893-1894. Early essays and The study of ethics, a syllabus

v. 5. 1895-1898. Early essays.