[ 201 ] 
Received January 30, 1767. 
XXI. "Ext raff of a Letter from John 
Howard, Efq \ ; F. R. X. to William Watfon, 
M. D. F. R m R. giving fome Obfervations 
on the Heat of the TV aters at Bath. 
62 1 7 67” ”\X7" ^ ^ ^ ^ had pleafure of fee- 
V V * n g you in London, you thought 
fome explanation of the paper, upon the heat of the 
Bath-waters, neceflary. The obfervations, I allure 
you, were made with great care. The three drd of 
them were made at the pump, where the waters are 
ufually drunk. I went feveral times into the king’s, 
and queen’s, baths ; and took them, where the fprings 
life in the king s bath, which is the warmed; part, 
and the mod: didant from thence the cooled. 
The pump in that bath correiponded with the upper 
pump. This I mention ; as in the other two baths, 
the thermometers did not nfe, by one degree, fo 
high as in the upper pumps 5 though I had’the 
pumps worked a confiderable time, to warm the pipes. 
The temperature of the other baths you fee in my 
paper. The hot bath, not being fo warm as the 
king’s, at fird, furprized me, until I conddered their 
times of filling.} and then the comparative downels 
of the fprings of the hot bath, to thofe of the king’s, 
accounted for this difference. 
The other obfervations are of various fprings, in 
and about Bath j that near St. James’s church is the 
Vol. LVII. D d ■ * colded. 
