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 early in life, when the mind is most receptive and there are no preconceptions to be overcome. Every means should be employed that will help the child to distinguish between principal colors and between modifications of principal colors. His attention should be directed at as early a stage as possible to the analysis of composite colors and the effects obtained by the combination of colored lights and the results of irradiant light. The principles of chromatic harmony are perhaps not simple, but a child, before whom right standards of color combinations are constantly presented, will acquire a correct aesthetic judgment that may become intuitive. The effect of such a training on the higher development of our people and on their appreciation of true art would be of the greatest value.

If the instruction in color is to be systematic and efficient, it is unquestionable that there must be a simple nomenclature for the standard colors; and for the teacher's guidance at least as. well as for the use of the older pupils, a scientifically accurate system of describing any required modification of these recognized standards. The system presented in this book is based on the well-known principle of the Maxwell wheel and has been elaborated by one who has had in view not only the theory of the subject but also the practical possibilities of its use in preparing educational material. This fact, I feel sure, greatly enhances the value of the conclusions at which he arrives.

2em Williams College, December 20, 1894.