The subject under discussion is one of more than usual importance. It is said that there are, in Philadelphia alone, more than twelve hundred school-children who are unable to keep up with their classes and for whom no adequate provision has been made. This large number does not include the high-grade imbeciles and idiots who never get into the schools, but only those who are said to be "backward in their studies."
Scientific discussions often fail to be of value because of a lack of a definite and uniform nomenclature and therefore it may be well to come to some understanding as to exactly what we mean by the term "backwardness in children." No two children are of exactly the same grade, mentally, but they differ in this respect as they differ in respect to physical characteristics. The backward child, according to the common acceptation of the term, is one