Another book from the great English mathematical physicist—this time a small book and one calculated to give to the intelligent reader, untrained in mathematics, as far as it is possible, a picture of the universe as it is now seen by the mathematical physicist.

The psychiatrist is accustomed to unusual contrasts in life and this book suggests such a one and a pleasant one. Hardly anyone would offhand expect a mathematical physicist to write a book such as this. It is a book that might almost have been written by a poet, at least the author sees the universe with the eyes of a poet, even if, between times, he may busy himself with the mysterious formulae which so few of us know.

The book is both fascinating and commanding, and gives a wonderfully clear picture of how matters stand today in the face of all the recent rapid advances. The universe, to the author, looks more like a great thought than a great machine, and not only that, however the artificer