Eddington, Sir Arthur. The Philosophy of Physical Science. [New York:  The Macmillan Company, N. Y. $2.50.]

This volume stands shoulders above any one is apt to find in a long time. Gone is the day when relativity theory and its implications could not reach into every day life and the laboratory. Anyone who has any pretension to even a remote understanding of science would have to know what this volume contains if he could not stand the accusation of naivété. Eddington reasons clearly and hard. He demands a close sequence of thought. His style cuts with the solid edge of the diamond of scientific training. One must not hope to absorb it all in one sitting. Perhaps those trained in the mathematical and descriptive phases of modern physics are the only ones exempt, but from what this reviewer has read, no one does it just as Eddington does. If this review achieves the length of a paper, it is only because the material demands it. The very title of the volume is not any appeal to something unscientific. It still is amazing to see philosophy disparaged from so-called scientific quarters. May this volume forever silence them.

Eddington starts by showing that the belief that there are only philosophies of scientists rather than a philosophy of science, is unfounded. Science itself depends on a body of opinion rather than on one man's opinion. One cannot hold that a body of opinion is necessarily correct. As a matter of fact it often is proven to be incorrect. Psychological