Produced by Chris Curnow, Chris Jordan and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) LIGHT AND COLOUR THEORIES [Illustration: TINTOMETER. Form of Instrument for Opaque Observation.] [Illustration: Reproductions of some Medals awarded to JOSEPH W. LOVIBOND’S Method of Colour Analysis FOR Scientific and Commercial Purposes.] LIGHT AND COLOUR THEORIES and their Relation to Light and Colour Standardization By JOSEPH W. LOVIBOND ILLUSTRATED BY 11 PLATES COLOURED BY HAND [Illustration: Logo] London E. & F. N. SPON, Limited, 57 HAYMARKET New York SPON & CHAMBERLAIN, 123 LIBERTY STREET 1915 CONTENTS PAGE List of Plates vii Purpose ix CHAPTER I. Introduction 1 CHAPTER II. Evolution of the Method 5 CHAPTER III. Evolution of the Unit 9 CHAPTER IV. Derivation of Colour from White Light 11 CHAPTER V. Standard White Light 14 CHAPTER VI. Qualitative Colour Nomenclature 17 CHAPTER VII. Quantitative Colour Nomenclature CHAPTER VIII. The Colour Scales 28 CHAPTER IX. Colour Charts 31 CHAPTER X. Representations of Colour in Space of Three Dimensions 34 CHAPTER XI. The Spectrum in relation to Colour Standardization 36 CHAPTER XII. The Physiological Light Unit 45 APPENDIX I. Colour Education 59 APPENDIX II. The Possibilities of a Standard Light and Colour Unit 69 APPENDIX III. Dr. Dudley Corbett’s Radiometer 83 Index 89 ERRATA.