International Education Series

EDITED BY

WILLIAM T. HARRIS, A. M., LL. D.

VOLUME XXXIII.

THE

PSYCHOLOGY OF NUMBER

AND ITS APPLICATIONS TO
METHODS OF TEACHING ARITHMETIC

BY

JAMES A. MCLELLAN, A. M., LL. D.
PRINCIPAL OF THE ONTARIO SCHOOL OF PEDAGOGY, TORONTO

AND

JOHN DEWEY, FH, D.

HEAD PROFESSOR OF PHILOSOPHY IN THE UNIVERSITY OF CHICAGO

"The art of measuring brings the world into subjection to man; the art
of writing prevents his knowledge from perishing along with himself: to-
gether they make man-what Nature has not made him-all-powerful and
eternal."-MOMMSEN.

NEW YORK

D. APPLETON AND COMPANY