[ 3 ° ] 
times, or oftener, as they find neceffary. The whole 
is concluded with a gentle purge, tho’ the waters 
themfelves are of a laxative nature. 
There is another fpring. in the town of the fame 
nature, but not fo warm, as the Brudel : it is called 
the Mill-fpring, and is only tepid. Thofe of a warm 
or weak conftitution make ufe of this inftead of the 
other, both for drinking and bathing. 
There are likewife feveral chalybeat fprings in the 
neighbourhood of Carlfbad one at half a mile, and 
the other at two leagues diftance from the town. 
Both of them feem to refemble the water of the 
Pohun fpring at Spa ; but are not near fo ftrong. 
They do not ufe them medicinally on the fpot ; but 
they are brought to Carlfbad, and fold, in order to. 
be drank with their wine. I am, 
My Lord, " 
With the greateff refpedt,. 
Your Lordfhip’s 
Moft obedient humble Servant, 
Jeremiah Milles. 
Grofvenor-ftrcet, 
Jan. 19th, 1757. 
V. An EJfay towards afcertaining the fpecifc 
Gravity of living Men . By Mr . John 
Robertfon, F. R. S, 
Read Jan. 27, ^JOME time laft autumn I had occa- 
1757 * f lon to draw up a few examples on 
the ufe of a table of the fpecific gravities and weights 
of 
