POULTRY LOUSINESS IN THE HORSE. 219 



support (if I may presume so much) of the exceedingly clear 

 and well-written account of Mons. H. Bouley." 



Messrs Woodger, Moon, and others, have since published 

 interesting observations on the disease, which Mr Henderson 

 was perhaps the first amongst veterinarians to observe. 



Horses and other animals have been destroyed by wasps 

 and various flies, such as Simulum reptans, a very dangerous 

 animal, and which occurs chiefly in Hungary and the East. 

 In Africa another fly Chrysops ccecutiens attacks horses' 

 eyes, and blinds them. Argas Persicus torments, and even 

 kills the Persian horse, and it is said that in St. Domingo, 

 another parasite, Argas Americanus, bites the ears of horses, 

 and leads occasionally to fatal results. 



BURNS AND SCALDS. AMBUSTIO. 



* 



The list of skin affections is not complete without re- 

 ference to injuries arising from excessive heat or cold. In 

 the first place, with regard to burns and scalds, though 

 not so frequent or so deadly in the lower animals as in the 

 human subject, cases are not rare, and unless properly treated, 

 they prove very troublesome, and even fatal. The only 

 difference between a burn and a scald, is, that the latter is 

 usually caused by hot liquids, and covers a wide surface of 

 skin, without, as a rule, injuring it to a great depth. A burn 

 is commonly understood to be an injury resulting from flame, 

 or the contact of a burning solid object with the skin. Dupuy- 

 tren, the renowned French surgeon, classifies the conditions of 

 skin induced by excessive heat as follows : 



1 . " Erythema or superficial inflammation of the skin, with- 

 out vesicles. 



2. " Inflammation of the skin, with separation of the cuticle, 

 and the production of vesicles filled with serum. 



3. " Destruction of the papillary layer of the skin. 



