DISEASES OP SHEEP. 39 



few days they entirely disappear, the sheep becoming lively 

 again, the appetite reappearing, the discharge from the 

 nose and mouth ceases, as likewise the swelling of the lips 

 and eyelids, and the walk and movements become again 

 free and easy. Only in case of an extraordinarily large 

 number of pox, or in case of an irregular progress, some of 

 the above-described incidents remain, such as the discharge 

 from the nose and eyes, by which the latter are closed, the 

 want of appetite and a difficult respiration. 



4. Period of healing.— On. the thirteenth or fourteenth 

 day after contagion, or six or seven days after the eruption 

 of the pox, the latter begins to heal and dry off, lymph be- 

 coming turbid, yellow and similar to suppuration ; the pox 

 growing flat and shrinking ; the upper skin deepening in 

 the centre ; and after the next four or six days the entire 

 pox, together with the lymph, forms into a hard and dry 

 scab, which drops off and leaves a reddish, dry, scarcely 

 perceptible mark, which at last entirely disappears. This 

 last or so-called healing period lasts from four to six days ; 

 so that the entire duration of the disease occupies about 

 eighteen or twenty days. 



In most cases the eruption of all the pox takes place at 

 one and the same time, except when an animal suffers from 

 too large a number of the pox, the eruption of which may 

 follow in short succession ; in such exceptional cases, how- 

 ever, the interval of the different periods occupies only a few 

 days. In all cases which I observed a regular succession of 

 the aforementioned periods took place. When the disease 

 occurs under the regular, and so to speak natural, progress, 

 the pox is called " innoxious pox." This is; however, not 

 always the case : numerous interior and exterior known 

 and unknown influences alter the nature of the disease, and 

 render it a most destructive plague. Under such circum- 



