[ 8 39 ] 
LXXIII. An Account of the hot Baths ofV i- 
nadioj in the Province of Coni in Pied- 
mont • with the State of the Weather at 
Turin in the Year 1759 : In an ExtraEl 
of a Letter from Dr. Jofeph Bruni, 
F. R. S. to Mr. Henry Baker, F. R. S. 
Read June 5, f 
1 760. 
Deal* Sir, Turin, Feb. 24, 1760. 
''HE warm baths, which have been 
fo very ferviceable to the Chevalier 
the rocks, near the 
T 
through 
village 
Offorio, run 
called Vinadio, in the province of Coni. 
The water is very clear, and fo warm, one cannot 
bear the hand in it : the contents are fulphur diffufed 
through it, and fome fait almod like common fait. 
By evaporation, you get five, fometimes fix grains, 
from a pound of water. I fend you a fmall quan- 
tity of the fait, gathered from the ftones by which 
the water runs, before the rifing of the fun, for in 
the day-time it is not found upon them, except in 
winter. Where thefe waters run, they depofit oily 
particles, which, by degrees, join together, and form 
a foft, fpongious, greenifh-vellow fubdance, one inch 
almod in thicknefs, which is called muff'a : this, 
when dry, is wrinkled, takes fire, crackles, and gives 
the fmell of brimdone, and when entirely burnt, 
leaves a black afh behind. I immerfed a piece of 
filver in thefe waters, which, in a few minutes, be- 
came black. Their tade is neither fait nor acid, but 
difagreeable. The muff a left for two days in common 
water, fwells fix times thicker than it was, dinks, and 
throws up oily particles on the furface of the water. 
The 
