GREASE. 775 



of copper, with a small j)roportion of carbolized glycerine, 

 succeed in arresting the foetid discharge and starting a healthy 

 reaction. 



In those instances where tissue-change and great papillary 

 hypertrophy exist and largely impede the proper application 

 of remedies, the most expeditious and. least painful mode of 

 treatment is the removal at once by the actual cautery of the 

 elevated and projecting hyperplastic papillary structures. 



In all these exhibitions of this chronic skin affection, having 

 obtained a soluble state of the bowels, and given due attention 

 to dietetic and sanitary conditions, we will find benefit from 

 the employment internally of tonic and diuretic medicines. 

 Sulphuric acid and sulphate of iron, with vegetable stomachics, 

 are usually alternated Avith such salines as sulphate of soda 

 or magnesia, or with preparations of arsenic or iodine. 



B. DISEASES OF THE HAIRS AND HAIR-FOLLICLES. 



When studying the diseases of the skin of the horse, and 

 giving them more than a cursory attention, I have been in- 

 clined sometimes to regard this as a rather large class. The 

 reason for this being that, in examining the catarrhal inflam- 

 matory diseases, I have found that in many instances the 

 early and most distinct pathological changes have occurred 

 in intimate connection with hair-follicles and sheaths, to the 

 exclusion or appearance in a modified form of these in the 

 other skin-textures. However, having at present determined 

 to place the eczemata, so called, as examples of catarrhal 

 inflammations of the skin in general, and not as speciall}^ 

 attached to the hair-follicles, the affections included under 

 diseases of the hair and hair-follicles — not embracing those of 

 parasitic origin — are few in number. The chief representative 

 is alopecia or baldness, known also as alopecia areata or cir- 

 cumscripta. This, when occurring over limited and circum- 

 scribed areas, has been regarded as of parasitic origin, and 

 spoken of as Tinea deccdvceus. 



Regarding the name alopecia as indicating simple baldness 

 or absence of hair, it has been thought, although not certainly 

 proved, that this, as an ultimate result, is reached by two 

 modes of action ; one attributable to parasitism, the other to 

 non-parasitic influence. As observed in the horse, it has in 



