INFLAMMATION OF THE BRAIN. 469 



sudden pain ; his respiration is slow, although he will some- 

 times make long inspirations, and has all the appearance of 

 his breathing being entirely suspended. The animal be- 

 comes exceedingly restless, lying down, starting and rising 

 up suddenly and frequently, with signs of delirium, and 

 groans piteously. When this becomes great, the eyes have 

 a red and furious appearance ; and at other times he mani- 

 fests symptoms of stupefaction and listlessness, and shows 

 evident signs of constant fear, avoiding every object which 

 he approaches. Sometimes he is quite ungovernable, and 

 never lies down to repose. If the disease has been allowed 

 to gain an ascendency, or has not been abated by the ordi- 

 nary treatment, then the animal sinks into a state of stupe- 

 faction and total want of energy or tact. In some cases, 

 the animal urinates frequently, and it is of a high colour 

 and very hot ; at other times it is paler than usual and much 

 thinner, but in both cases he stales frequently. 



When strong lethargic symptoms ensue, in consequence 

 of sudden abatement of the frenzy and irritation, the pulse 

 becomes feeble, and the strength quickly diminishes. This 

 is strongly symptomatic of approaching dissolution. But on 

 the other hand, if the fever and redness of the eyes gradu- 

 ally subside, without the pulse suddenly sinking, or great 

 and quick debility ensuing, it is pretty certain that the 

 animal is in the way of recovery. 



When cattle have died of this complaint, their heads 

 have been opened, and it has been found that the mem- 

 branes have exhibited strong inflammatory symptoms, and 

 in many cases in the substance itself, and even effusion 

 of blood, where the animals have been greatly frenzied. 



Causes. — Great heat, in exposed situations, where there 

 is no shade to screen them from the mid-day sun, an ex- 

 cess of exercise, a sudden change from poor to rich pas- 



