INFLAMMATION OF THE BRAIN. 
469 
sudden pain ; his respiration is slow, although he will some¬ 
times make long inspirations, and has all the appearance ot 
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 pr'Tvdde, 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- 
