162 NON-PAKASITIC SKIN DISEASES. 



ment, which, is made as follows: — Chrysophanic acid, 20 grains; 

 Wright's liquor carbonis deterg., 20 minims; white precipitate 

 (hydr. amm. chlor.), 20 grains; benzoated lard, 2 oz. The part 

 should neither be fomented nor poulticed. The horse may have lin- 

 seed mashes or oil, given to him daily, as well as carrots or green 

 fodder. Beans and kiln-dried or musty oats should be avoided. 

 Two ounces of bicarbonate of soda and an ounce of liquor arsenicalis 

 may be mixed through the food or water daily. A drachm and a 

 half of tartar emetic may be substituted for the arsenic, which 

 should not be continued for longer than a week at a time ; as it is 

 liable to accumulate in the system. 



Warts and NaeYi 



consist in excessive growth, by the implicated paiDillae of the skin, 

 of epithelium (p. 154) in the form of excrescences. This defective 

 state of the skin is due to impaired vitality of the part, and is often 

 caused by neglect of cleanliness. Warts are generally found on the 

 lower part of the belly, on the lips, nostrils and eyelids, and about 

 the sheath and penis of the horse, or udder of the mare. 



The appearance and position of a wart will sufficiently indicate 

 the proper means for its removal, whether by caustics ; the knife ; 

 the scissors; tying it with silk, thread or horsehair; or by the 

 firing-iron. The hot iron may be often used with advantage, after 

 the wart has been cut off. On parts requiring delicate treatment, 

 such as the eyelids or lips, the daily and careful application of 

 strong glacial acetic acid may be tried ; or a saturated solution 

 of washing soda in water, four or five times a day, for a few days. 

 A saturated solution of caustic potash, carefully put on, is an 

 admirable wart solvent. The application of fresh blood has 

 often been recommended. Arsenic (5 grains daily in the food 

 for a week) has sometimes a good effect in the removal of these 

 excrescences. 



A ncevus is a tumour formed by a new growth of blood-vessels. 

 In man, " birth-marks,^' or " port-wine stains," are familiar forms 

 of it. The only kind of naevus which I have observed in horses is 

 the superficial variety that is often found under the belly. Nsevi 

 somewhat resemble warts in appearance, except that they have a 

 broader base, and are much more inclined to bleed from injury. 

 They can be treated in the same manner as warts. 



Hidebound 



is a symptom of ill-health, and is not in itself a disease. The skin 

 is dry and hard, and appears to be drawn tightly over the animal's 

 body, so that it is difficult to pinch it up with the fingers anywhere 

 over the ribs. This condition is generally brought on by indiges- 



