目次: “…Mysticism and logic -- The place of science in a liberal education -- A free man's worship -- The study of mathematics -- Mathematics and the metaphysicians -- On scientific method in philosophy -- The ultimate constituents of matter -- The relation of sense-data to physics -- On the notion of cause -- Knowledge by acquaintance and knowledge by description.…”

目次: “…--The place of science in a liberal education.--The study of mathematics.--Mathematics and the metaphysicians.…”