Problems of Life and Mind: The principles of certitude. From the known to the unknown. Matter and force. Force and cause. The absolute in the correlations of feeling and motion. Appendix: Imaginary geometry and the truth of axioms. Lagrange and Hegel: the speculative method. Action at a distance

BY THE SAME AUTHOR.

THE STORY OF GOETHE'S LIFE. 1 vol. 12mo. $1.50.

PROBLEMS OF LIFE AND MIND.

First Series :

THE FOUNDATIONS OF A CREED.

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[In Preparation: Problems of Life and Mind, Second Series.]

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