A 1901 manual by David Paterson for dyers, calico printers and textile colour chemists on matching dyed colours on textiles. It covers colour perception and the structure of the eye, the qualities of daylight, simultaneous contrast, reflected versus transmitted-light examination, and the effects of fibre lustre, transparency and dyestuff optics such as fluorescence. Later chapters treat colour-blindness, tinted films as matching aids, silk trimmings, artificial illuminants (electric arc, magnesium, acetylene, Welsbach, gas), and absorption spectra explaining why shades that match in daylight differ in gaslight. It has a coloured frontispiece, diagrams, photographs, an index, and publisher's advertisements at the back.