12 OCTOBER 1889, Page 44

Colour. By C. T. Whitmell. (W. Lewis, Cardiff.)—The por- tions

of this treatise that discuss " Colour-Blindness " and " Colour-Perception " possess much new and valuable matter, and point to much that can be done in the way of verifying theories and comparing them. The plan of the book does not seem as clear and as compact as it might be, but it is nevertheless a fairly in- structive and interesting manual of colour.