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or fifteen days, if any preflure reft on the brain, the patient 
becomes heavy, grows drowfy, comatofe, and fometimes con- 
vulfed. The firft appearance of any of thefe fymptoms is the 
critical time of alarm, and the operation fhould be immediately 
proceeded to. 
Casn IV... J. O}Mara received a violent blow over the middle 
of the left parietal bone. It was for a good many days dreffed 
by..a perfon in the neighbourhood; but not appearing to mend, 
I was applied to. I found afeemingly flight contufed wound, 
with a bare bone; and feeing him heavy and drowfy, I con- 
cluded a preffure;on the membranes of the brain. As he ap- 
peared more ftupid,the next morning, I removed the fcalp, and 
found underneath a.confiderable fracture and depreflion. The 
operation immediately followed the incifion; the deprefled part 
was raifed, fome {mall fplints removed, and he is, at this day, 
_a healthy-man. 
, Case V.. William O'Neil received. a very. extended wound on 
the fuperior part of the left parietal, which bared_the bone 
_for near) two, inches, with;a,yiolent contufion about the centre 
of that .bone... ‘The, wound was drefled, and every precaution 
taken.to, prevent fever and inflammation. He went on tolerably 
well for twelve days, except that the wound on the parietal 
never,,exhibiteda pleafing afpect., About; this time | perceived 
him to, grow heavy and drowfy. I more narrowly infpected 
the head ;; though the bare, bone became. fenfibly difcoloured, 
and though I expected exfoliation would follow, yet I was well 
Ath convinced 
