Seventh Impression. Cr. 8vo, 5s. net; Limp, 3s. 6d. net.

ROADS TO FREEDOM: SOCIALISM, ANARCHISM AND SYNDICALISM

Fourth Impression. Cr. 8vo, 5s. net; Limp, 3s. 6d. net.

THE PRACTICE AND THEORY OF BOLSHEVISM

Second Impression. Cr. 8vo, 6s. net.

OUR KNOWLEDGE OF
THE EXTERNAL WORLD
AS A FIELD FOR SCIENTIFIC METHOD
IN PHILOSOPHY

BY
BERTRAND RUSSELL, F.R.S

LONDON: GEORGE ALLEN & UNWIN LTD
RUSKIN HOUSE, 40 MUSEUM STREET, W.C. 1

First published in 1914 by
The Open Court Publishing Company