PHYSICAL AND LITERARY. 491 



Those who have never feen the dif- 

 cafe, not conceiving, perhaps, how a thin 

 membrane, as is that of the bladder, can 

 be thickened into fuch a remarkable tu- 

 mor, may be impofed upon, and apt to 

 miftake it for one of another kind, with- 

 in the peritoneum, or between that and 

 the abdominal mufcles,or in the mufcles 

 themfelves. But it is pretty certainly 

 diftinguiflied by the following figns. 

 Befides its fituation in the middle of the 

 hypogaftrium, and its arifing from un- 

 der the OS pubis ^ where it is attached, it 

 is more diilindlly circumfcribed and 

 rounded. The tumor has an oval form'. 

 It is moveable, which can hardly be fup~ 

 pofed of any other tumor in this place. 

 And it was very obfervable in hiflory 

 third, though not mentioned there, that, 

 inftead of falling down to the fide on 

 which the patient lay, as, from its 

 weight, we imagine it "fhould have 

 done, it mounted up to the' os ileum of 

 the other fide. This can only be ac- 

 counted for from the inteftlnes falling 



under 



