necessary in his system to be accurately made. We
all appreciate the necessity for some improvement in our ideas of color,
and the natural inference is that the training should be begun in early
youth. The present system in its modified form possesses elements of
simplicity and attractiveness which should appeal to children, and give
them almost unconsciously a power of discrimination which would prove of
immense value in later life. The possibilities in this system are very
great, and it has been a privilege to be allowed during the past few
years to keep in touch with its development. I cannot but feel that we
have here not only a rational color nomenclature, but also a system of
scientific importance and of practical value.

H. E. CLIFFORD.

MASSACHUSETTS INSTITUTE OF TECHNOLOGY,
February, 1905.

CONTENTS.

Introduction By Professor Clifford.

Part I.

Chapter Paragraph

I. COLOR NAMES: Red, Yellow, Green, Blue, Purple 1
Appendix I.--Misnomers for Color.

II. COLOR QUALITIES: Hue, Value, Chroma 20
Appendix II.--Scales of Hue, Value, and Chroma.

III. COLOR MIXTURE: A Tri-Dimensional Balance 54
Appendix III.--False Color Balance.

IV. PRISMATIC COLORS 87
Appendix IV.--Children's Color Studies.

V. THE PIGMENT COLOR SPHERE: TRUE COLOR BALANCE 102
Appendix V.--Schemes based on Brewster's Theory.

VI. COLOR NOTATION: A Written Color System 132

VII. COLOR HARMONY: A Measured Relation 146

Part II.

A COLOR SYSTEM AND COURSE OF STUDY
BASED ON THE COLOR SOLID AND ITS CHARTS.
Arranged for nine years of school life.

GLOSSARY OF COLOR TERMS.
Taken from the Century Dictionary.

INDEX
(by paragraphs).

CHAPTER I.

COLOR NAMES.

Writing from Samoa to Sidney Colvin in London, Stevenson[1] says:
"Perhaps in the same way it might amuse you to send us any pattern of
wall paper that might strike you as cheap, pretty, and suitable for a
room in a hot and extremely bright climate. It should be borne in mind
that our climate can be extremely dark, too. Our sitting-room is to be
in varnished wood. The room I have particularly in mind is a sort of bed
and sitting room, pretty large, lit