71 



tail, while the third species does not burrow into the skin and is 

 found on the extremities. 



Symptoms. — This disease is characterized by great itchiness, 

 associated with the formation of pustules. As the disease devel- 

 ops, large surfaces become destitute of hair and are covered by 

 powdery crusts of variable thickness. At a later period the skin 

 becomes thickened, wrinkled, and fissured, assuming the appear- 

 ance of the skin of the rhinoceros. 



Treatment. — The first essential is the separation and isolation 

 of the unhealthy from the well animals. Wash the affected 

 parts thoroughly with warm water, soap, and a scrubbing brush, 

 and apply the following: Acetanilid 10 parts, creolin Ti parts, 

 cosmoline 20 parts. Melt the cosmoline and mix with the other 

 ingredients while cooling. This ointment should be applied 

 twice a day and the parts thoroughly washed every other day. 

 Continue the treatment until the skin becomes healthy. 



SIMPLE INJURIES TO THB EYE. 



Inflammation of the mucous membrane lining the eyelids may 

 be caiised by bruises or the presence of a foreign body, such as 

 sand, chaff, etc. 



Treatment. — If due to the presence of a foreign body it should 

 be removed at once and the eye bathed with cold water and the 

 following eye lotion applied: Sulphate of zinc 80 grains, boric 

 acid 1 dram, water 4 ounces. 



A clean, dark cloth should be placed over the injured eye so as 

 to exslude the light. The cold-water irrigations and the medici- 

 nal treatment should be continued twice daily until the parts 

 assume their normal condition. If the eyelids should become 

 torn great care must be exercised in suturing, as the needle may 

 puncture the eyeball and blindness may follow. 



OPHTHALMIA — CONJUNCTIVITIS. 



Inflammation of the outer parts of the eyeball, the exposed 

 vascular and sensitive mucous membrane (conjunctiva) which 

 covers the ball, the eyelids, and the haw. 



The causes of external ophthalmia are mainly those which act 

 locally — blows with whips, clubs, and twigs; the presence of 

 foreign bodies, such as chaff, dust, sand, ammonia arising from 

 the excrement, etc. 



