A THEORY OF THE
MECHANISM OF SURVIVAL
THE FOURTH DIMENSION AND ITS APPLICATIONS
BY
W. WHATELY SMITH
London:
KEGAN PAUL, TRENCH, TRUBNER & CO., LTD.
NEW YORK: E.P. DUTTON & CO.
1920
TO
MY MOTHER
When we can no longer interpret a phenomenon by the known, we must needs try to do so by the unknown...."
"It is well, in spite of everything, to seek an explanation of the inexplicable; it is by attacking it on every side at all hazards that we cherish the hope of overcoming it."
Maeterlinck. "The Unknown Guest."