0་་ THESE Talks are founded upon lectures delivered before the Summer School of the University of Illinois in June, 1905. The interest which was shown in the subject and in the views expressed encouraged me to state rather more elaborately and in book form what I felt in regard to a matter which is certainly of great importance, and concerning which so many teachers are in doubt. I wish here to express my obligation to Assistant-Professor Henry G. Pearson, who has very kindly gone over the manuscript, and to whom I am indebted for suggestions of great value. 161004 |