The wood extracts and camomile produce all sorts of peculiar colors. They are reasonably safe, but suffer from the disadvantage that the dyes are difficult to prepare and the result not especially permanent. Most of these dyes do not penetrate the hair shaft, but merely coat it so that their repeated use tends to make the hair quite brittle. Metallic dyes include combinations of lead, silver, copper, tin, and other metals. All metallic hair dyes, according to Dr. McCafferty, who has written extensively on the subject, must be considered as potentially dangerous when used for any length of time. The material may be absorbed into the body and the person so saturated with metallic poison that he develops serious symptoms. Most of the dye substances offered on the market and advertised in publications are combinations of henna with metallic substances. The dye action depends principally on the pyrogallol and on the metal, with just enough henna present to permit the manufacturer to use the name “henna dye.” The most common dye used today is the synthetic drug known as paraphenylene-diamine. Many persons are especially sensitive to this drug and develop severe eruptions following its use. In certain instances, eruptions on the back of the neck and on the arms follow the wearing of fur dyed with this substance. In Germany, the dye must always be marked with a “poison” label and most European countries have followed that example. In this country, legislatures are only beginning to consider legislation of a similar character. If a person is sensitive to paraphenylene-diamine, his scalp and face will begin to tingle and itch after its application, and this will be followed, in from 10 to 12 hours, by a swelling and blistering of the skin. The eyelids also may swell to such an extent that the person is unable to see. Most of the cosmetic establishments use this dye for their work. The treatment given by most physicians consists in wet dressings of boric acid solutions and in small doses of X-ray to the region concerned. Following the subsidence of the preliminary symptoms, soothing creams are applied to the tissues. Dr. McCafferty points out that every substance used as a dye remover is a dangerous poison, which, if it does not injure the person using it, at least makes the hair extremely brittle. It is his belief that dye removers should be legislated out of the beauty shops. SKIN ERUPTIONS LAID TO POISON IN DYED FUR Every winter physicians who specialize in diseases of the skin are asked to see cases of eruptions around the throat and wrists resulting from poisoning with incompletely or improperly dyed furs. The principal symptoms are blotches and swelling with itching and burning, so severe in some cases that the person cannot sleep at night. _Rabbit Becomes Beaver._--The trouble is found in most instances to result from rabbit that is dyed to imitate beaver, although all sorts of furs may be involved.