The THE MACMILLAN COMPANY NEW YORK BOSTON CHICAGO MACMILLAN & CO., LIMITED LONDON. BOMBAY CALCUTTA THE MACMILLAN CO. OF CANADA, LTD. TORONTO BY STEPHEN SHELDON COLVIN, PH.D. PROFESSOR OF PSYCHOLOGY AT THE UNIVERSITY OF ILLINOIS New York THE MACMILLAN COMPANY 1917 All rights reserved LB10 51 ·C5 1917 HARVARD UNIVERSITY GRADUATE SCHOOL OF DUCATION MONROE C. GUTMAN LIBRARY COPYRIGHT, 1911, BY THE MACMILLAN COMPANY. Set up and electrotyped. Published October, 1911. Reprinted January, July, 1912; January, 1913: April, 1913; January, 1914. ; July, 1914; March, December, 1915; May, 1916; January, July, 1917. Norwood Press : J. 8. Cushing Co. - Berwick & Smith Co. |
