EXPERIMENTAL STUDIES IN PSYCHOLOGY AND PEDAGOGY EDITED BY LIGHTNER WITMER DEPARTMENT OF SPECIAL PUBLICATION I. SPELLING IN THE ELEMENTARY SCHOOL SPELLING IN THE ELEMENTARY SCHOOL: AN EXPERIMENTAL AND STATIS- TICAL INVESTIGATION BY OLIVER P. CORNMAN, PH.D. SUPERVISING PRINCIPAL OF THE NORTHWEST SCHOOL, PHILADELPHIA LIBRARY UNIVERSITY LELAND STANFORD JUNIC BOSTON, U.S.A. 1902 |