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Stibbs, as another voucher for the number of men 
feized with the gaol-fever, and what proportion they 
bore to the whole number, employ’d by him in let- 
ting up the ventilator in Newgate. But with regard 
to what he fays, in relation to the better health of 
the prifoners fince the ufe of that machine, as the 
reverend Dr. Hales is making a flxidt inquiry about 
that circumftance, I fhall delay making any reflections 
upon it, till I get full information from that worthy 
member of our Society. 
OURS I receiv’d, and have fent you the names 
of all the workmen, that work’d on the venti- 
lator in Newgate, and how many had the gaol- 
diftemper. One of the principal men, whofe name 
was Wilmot, died, and all the reft recover’d. I am 
inform’d by the perfon, whofe name is Jackfon, that 
takes care of the windmill and ventilators, that there 
had been but one perfon died in two months ; where- 
as before the ventilator was ufed, there died fix or 
feven in a week ; fo that it appears very plain, that 
the ventilator caufes the foul ftagnated air to circu- 
late, and thereby confequently is drawn out of the 
feveral wards. 
This is the belt account I can give, and hope it is 
to your fatisfaCtion. I remain, Sir, 
To Dr. Pringle. 
S I R, 
Jan. 25, 1753. 
Your humble fervant to command, 
Tho. Stibbs. 
