... an oil, of a color similar to its own. Hair contains at least ten distinct substances: sulphate of lime and magnesia, chlorides of sodium and potassium, phosphate of lime, peroxide of iron, silica, lactate of ammonia, oxide of manganese and margaim. Of these, sulphur is the most prominent, and it is upon this that certain metallic salts operate in changing the color of hair. Thus when the salts of lead or of mercury are applied, ... — International Weekly Miscellany Of Literature, Art, and Science - Vol. I., July 22, 1850. No. 4. • Various