764 SCALY OR SQUAMOUS INFLAMMATIONS. 



of scales are usually deepest in the centre of the portions 

 diseased. When of some time standing, and under certain 

 conditions, fissures and suppurative action are liable to be 

 established, causing much irritation and extensive textural 

 changes in the carpal and tarsal flexures, and also in other 

 parts of the limbs. This condition is a fruitful source of lame- 

 ness, not merely from the impediment offered to motion at the 

 exact situation of the prominent lesion, but also from the 

 general stifthess connected with dermal infiltration. The 

 entire conditions are liable to exacerbations from various 

 causes and extrinsic operating agencies, such as accumulations 

 of dirt, excess of moisture, and sudden atmospheric changes ; 

 while peculiarities of dietary seem also to have a certain 

 amount of influence on its development. Itching, although 

 existing, is not such a prominent symptom of iisoriasis in 

 the horse as of some other forms of inflammatory action. 



Treatment. — When much local irritation, itching, or con- 

 gestion exist, the cooling or soothing treatment is particularly 

 called for. With general and moderate evacuants, such as 

 ensure an action of the bowels and kidneys, the local employ- 

 ment of glycerine and water, with a little sulphurous acid, 

 carron oil, or weak carbolized oil, will be found useful. The 

 employment of water liberally or alone, except so far as needful 

 for cleansing the parts, does not seem to answer Avell. AMien 

 a satisfactory state of the alimentary canal has been obtained, 

 or in some cases from the first, particularly when debility is a 

 prominent feature, tonics are indicated, and are best alternated 

 or given in conjunction with alkaline medicines. When the 

 dry and scaly condition is confirmed, a somewhat stimulant 

 local treatment is to be preferred. Instead of mild glycerine, 

 lotions, or even zinc ointment, one containing some of the tarry 

 preparations, or, in some instances, common iodine ointment, is 

 to be preferred ; while, for internal use, arsenic in combination 

 with alkalies, and a liberal use of linseed in the food, is always 

 deserving of trial. 



