[ 22 * ] 
XXVII. An Account of the Virtues of Soap 
in dijfolving the Stone , in the Cafe of the 
Rev . Mr. Matthew Simfon. Communi- 
cated by John Pringle, M. D. F. R. S . 
To the Rev . Tho. Birch, D. D. F. R. S. 
Read April 28, 
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A 
I R, 
Few days ago I received from 
Dr. Auftin, phyfician at Edin- 
burgh, the cafe of the Rev. 'Mr. Simfon, drawn up 
by himfelf, in the form of a letter to Dr. Auftin 3 
and which you. may remember was alluded to by 
Dr. Whytt, in the paper read at the laft meeting of 
the Society. 
As I am at liberty to communicate this account to 
others, I thought it would not be unacceptable to the 
gentlemen of the Society, to have another well- 
attefted inftance laid before them of the virtues of 
foap in diffolving the ftone, or, at lead, in removing 
all thofe painful fymptoms, which ufually accompany 
that diflemper. 
To the patient’s own narration I have fubjoined 
an extradt from Dr. Auftin’s letter to me, containing 
the fequel of the cafe from the date of Mr. Sim- 
fon’s letter to his death; with an account of the 
Rate of his bladder, as it appeared to Dr. Auftin. 
upon diffedion. I am, 
SIR, 
Your mod: obedient humble Servant, 
Pall-Mall, 27 April, John Pringle. 
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