The substance of The riddle of the universe,

Mode of access: Internet.

Ewigkeit ; weltkriegsgedanken u̲ber Leben und Tod, Religion und Entwicklungslehre,

Mode of access: Internet.

Die welträthsel. Gemeinverständliche studien über monistische philosophie,

Mode of access: Internet.

Naturalism and agnosticism : the Gifford lectures delivered before the University of Aberdeen in the years 1896-1898 /

Includes bibliographical references and index.

Tertium quid : chapters on various disputed questions /

Mainly reprinted from various periodicals.

Gesammelte populäre Vorträge aus dem Gebiete der Entwickelungslehre.

Mode of access: Internet.

Life and matter; a criticism of Professor Haeckel's "Riddle of the universe", by Sir Oliver Lodge

Mode of access: Internet.

Über den modernen Monismus, akademische Festrede.

Mode of access: Internet.

Humanism; philosophical essays,

The ethical basis of metaphysics.--'Useless' knowledge.--Truth.--Lotze's monism.--Non-Euclidean geometry and the Kantian a priori.--The metaphysics ofthe time-process.--Reality and 'idealism.'--Darwinism and design.--The place of pessimism in philosophy.--Concerning Mephistopheles.--On preserving appearances.--Activity and substance.--Humism and humanism.--Solipsism.--Infallibility and toleration.--Freedom and responsibility.--The desire for immortality.--The ethical significance of immortality.--Philosophy and the scientific investigation of a future life.

The riddle of the universe at the close of the nineteenth century,

Translation of Die Welträthsel.

Une controverse sur l'âme universelle au IXe siècle.

Bibliography: p. [69]-71.