For a Catholic audience of young people too often taught an chli approach to the mysteries of modern science, this may be a short step in the right direction. The information in the thumbnail explanations of some of the outstanding fields of modern science are compact in presentation and cover a wide range. To included are insect life, photosynthesis, the nature of light, the weather, bird migration, cosmic force, etc. But the scientific explanations are burdened with the admonition to accept the more ultimate mysteries without pretending to understand them. Mr. Webster is at pains to point to the spiritual damage done by champions of reason and the man- centered philosophers. We feel that in his equating of reason with a ruthless mastery of nature and in his presumption that men of wholly godless and unawed by the quality and quantity of the unknown he is fallsclous. Perhaps he should read a little Whitehead for full realization of the recognition of spiritual values of the unknown mysteries of science.