J[ohn?]Bacon, Theory of Colouring: being an analysis of the principles of contrast and harmony in the arrangement of colours, with their application to the study of nature, and hints on the composition of pictures, etc. by J. Bacon, professor of drawing and painting. Fourth edition, rev. and enl. London: G. Rowney & Co., 1872.

     A trade catalog and treatise, the work appeared in at least 19 editions. Rowney and Company, a competitor of Winsor and Newton, manufactured oil colors, "ground by an improved process by machinery." English paints were considered superior, and in addition to colors, the company sold knapsacks, easels, brushes, sketching boxes and even a portable tent for "sketching tours, pic-nics or summer excursions." The treatise included chapters on study from nature, commentary on specific works in the National Gallery, e.g. Turner's Beach in Devonshire and, in addition to the color wheel, chromolithographed examples to illustrate color relationships. The book's objective was to provide a handbook, for the student, of the "theoretical principles of combination, harmony and contrast."