216 RINGWOEM. 



II. — The appearances which, these spots present are 

 peculiar. Some are round, others are of an irregular form. 

 The hair in connection with them is of a dirty grey colour; 

 the spots appear, in fact, as though they had been dusted 

 with fine grey-coloured powder, and afterwards a gummy 

 fluid dropt amongst it, and there allowed to remain until the 

 whole became dry and encrusted. 



III. — If I place my forefinger firmly upon one of these 

 encrustations, the crust is readily forced aside, and a raw 

 surface is exposed, which upon examination with a common 

 magnifying lens, I find to consist of a number of minute pits 

 or cavities, many of which are filled with purulent matter ; 

 while running round the border of each of these cavities is a 

 delicate red line of variable thickness. 



The symptoms as described above are such as will be found 

 peculiar to every case of the disease. 



The Pathogokomic Symptoms are tlie circular form of 

 the sores, and the raw surfaces which are exposed to view when 

 the crusts are removed. 



Teeatmeistt. — Eingworm, like Mange, requires to be treated 

 topically. The disease is not difficult to cure. The best topical 

 applicants in general are, — Iodine and the Liquor Arsenicalis. 



Iodine. — The Iodine may be applied either in the form of 

 tincture or as ointment. If the tincture is used — first remove 

 the incrustations, then apply the remedy by means of a camel- 

 hair pencil. The sores should be painted with the drug, at 

 least twice a day, for several days in succession. The ointment 

 should be made as follows : — 



Iodine ... 1 drachm 



Lard ... ... ... 1 oz. 



