28 



BULLETIN 125, U. S. DEPARTMENT OF AGRICULTURE. 



figure 1, shows sheep No. 174 when down and very sick. This picture 

 was taken just before a spasmodic struggle for breath. 



In many cases in which the animals were strong enough to remain 

 on their feet, the gait was peculiarly stiff legged. Both fore and hind 

 limbs were affected, but the condition was most pronounced in the 

 hind legs. Sometimes the hind legs were moved less readily, approxi- 

 mating, perhaps, the condition noticed by other writers in laboratory 

 experiments. These symptoms were especially noticeable in the 

 cases in which the animals were fed and were not very sick. 



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Fig. 4. — Curve of respiration of sheep No. 160. 

 TREMBLING AND HEIGHTENED REFLEXES. 



The fed cases generally exhibited trembling and a sensitiveness to 

 sudden noises or movements. A blow upon the corral fence was fol- 

 lowed by a sudden start on the part of the animal, or a light blow upon 

 the animal was followed by a quick reflex movement. This con- 

 dition was not noticed in the drenched cases and seems to be more 

 characteristic of prolonged illnesses. As stated before, this symp- 

 tom of heightened reflexes had been noted by both Chesnut and 

 Hunt. 



COMA. 



While, as already noted under the head of respiration, death 

 resulted from respiratory failure and was frequently preceded by 

 spasmodic attacks of dyspnoea, there were other cases in which the 

 animals lay quietly hour after hour, and sometimes even for days, 

 with labored breathing, in a condition of coma which ended in 



