PHYSICAL AND LITERARY. 48/ 



To the fame purpofe is an obfervation 

 in Bonetus : Id egofaepe vidi fa5ium mfc" 

 neSiute, ut tunicae veficae potius coria alba 

 repraefentarent; which, though I have faid 

 that this affedlion is feldom taken notice 

 of, makes it probable that it is a more 

 common diftemper then is imagined; 

 and may it not fometimes be the caufe 

 of dyfury, or a troublefome excretion of 

 urine without pain, as the word imports, 

 in the aged efpecially, who moft fre- 

 quently are the fubjedls of this complaint.^ 

 For, when the mufcular fibres of the 

 bladder, from the thickening ofitscoats^ 

 have, in a great meafure, loft their tone, 

 the urine is with difficulty expelled alto- 

 gether by the prefTure of the diaphragm 

 and abdominal mufcles. Nor can it 

 be fo thoroughly expelled, but that a 

 portion of it always remaining in the 

 bladder will excite frequent inclinations to 

 urine, and perpetulaly difturb the patient. 

 In a vigorous conftitution of the blad- 

 der, it is able wholely to difcharge its 

 contents by the force of its own contrac 



tion ', 



