762 SCALY- OR SQUAMOUS INFLAMMATIONS. 



thorougli cleansing of the clothing, stables, and everything 

 connected with those animals in which the affection appears 

 communicable. X In external treatment, there is nothing better 

 than applications for some hours daily of woollen cloths wrung 

 from Avarm water, and gentle enunction on their removal 

 with simple ointment or olive oil. This to be carried out 

 until the removal of the cicatrices, when the application of 

 some zinc ointment, or a weak solution of sulphate of zinc, 

 to which has been added a little glycerine, will facilitate the 

 healing. 



G. SCALY OR SQUAMOUS INFLAilMATIONS. 



It is probable that the affections which are usually placed 

 in this group might, with equal propriety, find a place under 

 skin hypertroj^hies ; also we must not forget that a squamous 

 condition of the skin is met with in many and somewhat 

 varied conditions, but, like the state of pustulation, this 

 division is designed to embrace only those affections where 

 the scaly condition is met with, not as a result of previous 

 abnoraial dermal actions, but as an essential and primary 

 phenomenon. 



In other inflammatory actions affecting the dermal tissues, 

 squamation folloAvs as a sequence ; here the hyperemia, when 

 it does occur, is at once accompanied by an increase of the 

 scales of the epideraiis, apart from exudative action. 



These conditions, hypenemia and excess of epidermic cell- 

 production, may be local, and chiefly idiopathic, when it is 

 recognised by the term of psoriasis; or they may be more 

 general, and often symptomatic, and are then known as 

 pityriasis. 



This latter condition is sometimes encountered chiefly as a 

 symptomatic affair, generally associated with considerable con- 

 stitutional disturbance and not to be mistaken symptoms of 

 unthriftiness or ill-health. Such general hypertemia and ex- 

 tensive furfuraceous desquamation of epidermic scales, apart 

 from exudative action, may appear as itself the chief or only 

 attractive symptom, but is more frequently found in the train 

 of other symptoms, all pointing to some largely operating in- 

 fluence, or considerable orq-anic chano-e. 



