de upon a piece of black cloth placed upon a table.A piece of clean glass is placed upright between them, and,by looking through the glass at a certain angle, the reflectedimages of the two coloured surfaces will be combined, oneupon the other, as in the illustration. By slightly incliningthe glass… … Fig. 3.
Color in the textile industries · Dyes and dyeing
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![An illustration from The principles of harmony and contrast of colours [electronic resource] : and their applications to the arts (1890)](https://img.insideoutlibrary.com/img/200/ia-b21285676-85-0.webp)
