The subject of terminology in the field of art is extremely broad and for the most part indefinitely classified. Over 100 technical terms are in common use in the vocabulary of art. Often words are used by different authors with entirely different meanings, and in other cases the degree of difference between words is too slight to warrant use of a separate term. Also many of the terms are used interchangeably by different authors and frequently they are ambiguous and obscure in meaning and difficult to apply in public-school work. In general, the literature used as a basis for planning, organizing, and developing units of art instruction in the schools is very indefinite in regard to nomenclature. For this reason the committee on terminology centered the first part of its investigation upon a program of analysis to determine, if possible, the most significant words in common use. In the preparation of this bulletin, several art texts, reference books, and courses of study were examined for the purpose of determining the art terms that were most frequently used. On that basis, from these various sources the following were listed: Balance. Proportion. Repetition. Rhythm. Emphasis. Harmony. Color. Line. Light and dark. Unity. Radiation. Opposition. Transition. Subordination. Center of Interest. Dominance. Since the content for a course in related art should contribute very definitely to the girl's present and future individual and home needs it is suggested that only the minimum essential terminology be used, remembering that in such a course the chief concern is the development of those principles and facts that contribute to the realization of such objectives as have been suggested. There seems to be common agreement that balance, proportion, repetition, rhythm, emphasis, harmony, and color are of first importance in their contribution to beauty and that the various principles and facts concerning each should be developed in an art unit or course. The selection of these seven phases of art as fundamental is supported by Goldstein,[9] by Russell and Wilson,[10] and by Trilling and Williams.[11] The committee on art terminology has also given emphasis to these in the classification as set up in Table V of their report. This is here given in full. _Simplest form of classification_[12]