Foreword, by A. P. Brogan.--Retrospective introduction, by C. D. Leake.--Ethicogenesis, by C. D. Leake.--A philosopher's reply to a scientist's ethic, by P. Romanell.--A scientific versus a metaphysical approach to ethics, by C. D. Leake.--A naturalistic versus a positivistic approach to ethics, by P. Romanell.--A naturalistic logic with metaphysics, by P. Romanell.--Science implies freedom, by C. D. Leake.

1. The ethics -- 2. The logics -- 3. The esthetics.