( i6i ) 
III ^ DISCOURSE of the Operation of 
a Blifter whm it Cures a Fever, made at a 
Meeting of the Royal Society, by Williaoi 
Cockburn, M.D. of the CoL of Fhyf in Lood. 
andF.K,S. 
IN Purfuance of an Order of this Society, I fiiali En- 
deavor to Entertain you with a reafbnable Account, 
How the Ratfing of a Blijler may Cure a Fever ^ and its 
mofl terrible Symptom the Delirium^ and that in Six, Eighty 
or Ten Hours. 
This I chufe to do towards the Improvement of my 
own Profeflion,' and to mindfome malicious People, 
that we are not wholly imployed within thefe Doors, in 
the Defcribing the Features and Dreflesof Flies but in 
difcovenng too, how they may Benefit, and Hurt Man- 
kind; which is the ultimate end of all our Study. 
When I firft refolved to make this the SubjecS of my 
Difcourfe, I defign'd to be more full , and to have ex* 
tended it to an Enquiry, about the Power thefe Inftru- 
ments had to make a Wound, in what Manner, and for 
what Reafons fuch a Wound was made , and produ- 
ced fuch effeds : But the Subjeft proved endlefs ; 
and I can aflure you by much too long for this 
place • tho' mod Authors have gone it over flightly 
enough. ' 
It is not neceiTary to give you a Lift of thefe Sim- 
ples that have been found to make a Blifter ; fince that 
is as ufelefs to you, as it is Foreign to my purpofe. 
Neither is it profitable , in our prefent Bufineft, to lay 
before you the common and vifible eflfeds of laying on 
a Blifter : For I may believe, that there is hardly one 
A a in 
