CHAPTER XXXIX. 



DISEASES OF THE SKIN. 



CLASSIFICATION — WILLAN AND BATEMAN's, BENNETt's, AND BUCH- 

 ANAN'S CLASSIFICATIONS ERYTHEMATOUS INFLAMMATIONS — CLIP- 

 PING HORSES HERPES— URTICARIA. 



An essay was read a short time ago at a provincial veterinary 

 association by a veterinary surgeon, who stated that Professor 

 Spooner, in his lectures, instructed his class to the effect that if 

 all the skin diseases of the horse were put in a sack and shaken 

 up, they would turn out to be mange. With all due deference 

 to the essayist, I must demur from his conclusions ; and from 

 much observation, I am in a position to state that true mange 

 is a rare disease in this country. 



In the human being dise^ises of the skin are so numerous and 

 so important as to demand a speciality of study ; but in the 

 lower animals they are found to be much simpler in their nature, 

 fewer in their varieties, and more amenable to treatment. At 

 the same time, many of them bear so close a resemblance to 

 those of man, that a classification based upon the researches of 

 the more recent dermatologists, may with advantage be adopted 

 by the veterinary surgeon. 



There are three classifications : — 1st. The artificial one of 

 "Willan, Bateman, and others ; 2d. The natural arrangement 

 of Ahbert and others; and od. A pathological classification, 

 founded on the supposed morbid lesions ; but of these the 

 classification of Willan and Bateman is considered the best 

 for practical purposes. It is comprehended in the following 

 definitions of terms in common use in the description of skin 

 diseases : — 



