SYMPTOMS. 23 



2d. External Symptoms. 



As the incubative period declioes, the primary symptoms 

 visible to the eye occur in the following order : 



a. Loss of appetite^ exhibited first in aversion to all sorts of 

 green food, and on the following day in indifference to food of any 

 kind. At first the animal leaves a portion of its food, and then refuses 

 it altogether. 



h. Rumination. The animal now ceases to chew its cud, and then 

 there is manifest 



c. Constipation in its gradual development. The dung is of a dark 

 color, sometimes covered with slime on its surface. [Many show 

 signs of bellyache, by frequently looking round towards the tail and 

 bending up the back.] (Egan.) 



d. Diminution of the flow of milk (much greater than in pleuro- 

 pneumonia. Priestman.) 



External appearances are, first, 



1. Depression in looks, standing in the same posture, with 

 drooping head and reclining ears. These, with the horns and 

 other extremities, show a loss of natural heat. 



2. The first striking signs are manifest in a change of manner. 

 Most commonly the beast is remarkably heavy and dull, hangs 

 its head, lowers its ears, stays behind the herd, and when in 

 \\\.Q^t2\AQheeps away from the crib. (Egan.) Sometimes there 

 is a shaking of the head to and fro. If you lift it up, it goes 

 down again like a dead loeight. (Ernes.) 



3. Sometimes an animal will be excited, uneasy, shaking its head, 

 stamping with its feet, lowing frequently, butting with its horns, 

 and running away from the herd. If tied up in the stable, it 

 tears away from its chain and rope, and continually endeavors 

 to go elsewhere. (Egan.) 



4. Trembling motions now occur of the head and neck; the 

 hairs bristle up, especially on the back and towards the shoul- 

 ders ; the insertions of the horns and ears are sometimes cold, 

 sometimes w^arm ; the palate is dry ; the eyes shining, &c. 

 (Egan.) In the cases first observed in England by Professor 

 SiMOXDS, there were not the same nervous twitchings about 

 them that had been observed in Galicia. (1st Rep., p. 9.) 



f Respiration is slightly quickened, the expiration or outbreath 

 is prolonged, and the pulse rises a few beats. (Smart.) Joined with 

 a striking motion of the flanks and low groans, sometimes a 



