THE contents of this volume speak eloquently enough for the inclusion of Albert Einstein: Philosopher-Scientist in this series without any superfluous words from the editor.
Almost all of the matters which need to be mentioned here are of the nature of personal privilege.
There is, first of all, the matter of gratitude for help and co-operation. Foremost here stands Professor Einstein himself. Without his consent and willingness to co-operate, this book could never have appeared. But, how to express the editor's thanks and appreciation to him--in the coldness of mere words --this is something I know not how to do. Perhaps he will understand if I state simply that my obligation and gratitude to him are beyond the possibility of verbal expression.
Among the twenty-five other contributors to this volume there are no less than six Nobel-Prize winners in science; and essays have come from as many as eleven countries (viz., Australia, Belgium, Canada, Denmark, England, France, Germany, Ireland, Scotland, Switzerland, and the U.S.A.); an essay for this volume had also been promised by a leading scientist of the U.S.S.R. (although it has not yet actually reached the editor). The editor is as deeply and sincerely obligated to these important and busy scholars the world around as he is to Professor Einstein.
It proved impossible to bring out this volume at the time originally planned. It had been hoped to lay it on Professor Einstein's birthday-table on March 14th last, on the occasion of his seventieth birthday. No one regrets this delay in publication more than does the editor.
Other regrets are no less poignant. It was a tragedy of no mean importance that Max Planck was already too seriously ill, at the time of the conception of this volume, for him to