ENLARGEMENT OF THE THIRD EYELID. 313 



RECIPE (No. 2). 



Ointment for Ulcerated Eyelids. 



Take — Quicksilver, one drachm ; 



Strong nitric acid, a drachm and a half: 

 Dissolve the mercury in the acid, and while the solution is warm, 

 add six ounces of melted lard. Stir them well together until they 

 are thoroughly cold. 



Some of this ointment should be rubbed on the lids 

 morning, noon, and night ; care being taken that as 

 little as possible gets into the eyes. 



Should the above fail, the reader should try the 

 application recommended for scurviness round .the 

 flap, which is often spoken of as " Canker of the Ear.'* 



ENLARGEMENT OF THE THIRD EYELID. 



The quadruped not having hands to ward off the 

 dangers which threaten him, and to which the eyes 

 are particularly exposed, nature has given him a 

 moveable membrane, situated within the inner corner 

 of the eye ; this he can protrude at pleasure, either 

 as a defence to the eye, or to wipe off any temporary 

 nuisance. It is sometimes called, on account of its 

 function, the third eyelid. 



The dog is more adroit in the use of his paws than 

 many other animals are; therefore this membrane is 

 very little developed compared with the haw or mem- 

 brana nictitans of the horse or ox. It is, however, 

 far more subject to disease than the same membrane 

 in either of those animals. A little dust or gravel 



p 



