C 840 ] 
The fait does not ferment with acids. If you 
difiblve it in common water, and mix it with fyrup 
of violets, it gives fome appearance of a green colour 
the fame water poured on a lolution of fiver, it foon 
throws down a white fediment. Some fay thefe wa- 
ters contain nitre, and particles of other bodies > but 
this has not been demonftrated. 
The diforder of the Chevalier Olforio, for which I 
advifed him to the ufe of thefe baths, was, that he 
had loft the feeling of his fingers, had a weaknefs in 
his hands, and alfo in his legs, infomuch, that fome- 
times he could not walk in a ftrait line, but tottered 
from fide to fide. He could not extend his toes, and 
the foies of his feet feelcd, according to his own ex- 
prefiion, as if hard firings were drawn acrofs them. 
He tried many medicines to no purpofej but is now 
perfectly free from the above complaints, by the ufe 
of thefe warm baths ; of which he is fo fully con- 
vinced, that lie intends to go to them again next dim- 
mer, notwithftanding at that time of year the heat is 
there excefiive. 
He bathed in thefe waters forty times, when the 
ftomach was empty, in a morning ; and ftayed in 
them, at firft, half an hour, but lengthened the time, 
gradually, at laft, to a full hour. After each bathing, 
he was dried with cloths, and put into a warm bed, 
where a plentiful fweat came on for about half an 
hour j during which, the pulfe beat like that in an 
high fever, but became quieter, as the fweating 
abated. When the fweating was almoft over, and 
the pulfe quite regular, he was dried again with 
cloths, his fhirt was changed, and, fitting up in bed, 
he was refrefhed with a glafs of ftrong wine, and a 
