Diseases of the Nervous System. - 251 
there is an unmistakable desire for solitude. If the eyes 
at this period are closely observed, a vacant expression 
will be seen in them; and immediately they meet the 
gaze of the observer they are dropped in a weary, sleepy 
manner. 
As the disease proceeds, other and more marked symp- 
toms become developed. A tendency to mischief is 
suddenly manifested. Boots, slippers, hearth-rug, carpet, 
chair-legs, and what not, are worried. If the animal is in 
the kennel, the straw is mangled and scattered about, the 
brick-work scratched, flooring torn up, and the whole place, 
more or less, shows signs of destruction. 
The eyes assume a still more vacant expression; the 
gaze appears to be fixed on some distant object. Then 
a change takes place: the animal proceeds to examine 
‘most minutely every crevice and brick round his kennel ; 
this done, he retires again into obscurity, and in a few 
minutes repeats the operation. Or the eyes are directed 
with earnest attention to some imaginary moving object, 
as a beetle or spider, which they appear to be tracing in 
its course. Suddenly he jumps forward witha snap at 
the supposed offender; and then, as if ashamed at the 
hallucination, he crouches down, crawls away and hides 
himself. 
A flow of tenacious salvia is now present. The animal 
champs his teeth, and smacks his lips. As its tenacity 
becomes greater and its secretion more rapid, he strives to 
free his month of it with his paws, and this latter act has 
sealed the fate of more than one individual by being mis- 
taken for a bone fixed in the teeth or throat. * 
* Last year I was requested to visit a small toy terrier, belonging to 
a lady of title. The messenger informed me the animal was supposed 
to have a bone in its throat. On my arrival, which was between 9 and 
1o p.m., I found the subject, which the keeper’s wife was nursing, sit- 
ting with mouth slightly open. On removing my hand, after closing the 
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