Colour Vision and Structure of the Eye -- Perception of Colour -- Primary and Complementary Colour Sensations -- Daylight for Colour Matching -- Selection of a Good Pure Light -- Diffused Daylight, Direct Sunlight, Blue Skylight, Variability of Daylight, etc., etc. -- Matching of Hues -- Purity and Luminosity of Colours -- Matching Bright Hues -- Aid of Tinted Films -- Matching Difficulties Arising from Contrast -- Examination of Colours by Reflected and Transmitted Lights -- Effect of Lustre and Transparency of Fibres in Colour Matching -- Matching of Colours on Velvet Pile -- Optical Properties of Dye-stuffs, Dichroism, Fluorescence -- Use of Tinted Mediums -- Orange Film -- Defects of the Eye -- Yellowing of the Lens -- Colour Blindness, etc. -- Matching of Dyed Silk Trimmings and Linings and Bindings -- Its Difficulties -- Behaviour of Shades in Artificial Light -- Colour Matching of Old Fabrics, etc. -- Examination of Dyed Colours under the Artificial Lights -- Electric Arc, Magnesium and Dufton, Gardner Lights, Welsbach, Acetylene, etc. -- Testing Qualities of an Illuminant -- Influence of the Absorption Spectrum in Changes of Hue under the Artificial Lights -- Study of the Causes of Abnormal Modifications of Hue, etc. #COLOUR: A HANDBOOK OF THE THEORY OF COLOUR.# By George H. HURST, F.C.S. #With Ten Coloured Plates# and Seventy-two Illustrations. 160 pp. Demy 8vo. Price 7s. 6d. net. (Post free, 7s. 10d. home; 8s. abroad.) #Contents.# #Colour and Its Production -- Cause of Colour in Coloured Bodies -- Colour Phenomena and Theories -- The Physiology of Light -- Contrast -- Colour in Decoration and Design -- Measurement of Colour.# Reissue of #THE ART OF DYEING WOOL, SILK AND COTTON.# Translated from the French of M. HELLOT, M. MACQUER and M. le PILEUR D'APLIGNY. First Published in English in 1789. Six Plates. Demy 8vo. 446 pp. Price 5s. net. (Post free, 5s. 6d. home; 6s. abroad.) #Contents.# Part I., #The Art of Dyeing Wool and Woollen Cloth, Stuffs, Yarn, Worsted, etc.# Part II., #The Art of Dyeing Silk.# Part III., #The Art of Dyeing Cotton and Linen Thread, together with the Method of Stamping Silks, Cottons, etc.# #THE CHEMISTRY OF DYE-STUFFS.# By Dr. Georg Von GEORGIEVICS. (p. c23) Translated from the Second German Edition. 412 pp. Demy 8vo. Price 10s. 6d. net. (Post free, 11s. home; 11s. 6d. abroad.) #Contents.#