[ 7i ] 
If into a fpoonful of common (Milled water is 
dropp’d one drop of oil of tartar per deliquium , and 
then added ten drops of a drong folution of corrodve 
fublimate, the mixtuie will immediately become tur- 
bid and brown, and with a few drops of the folution 
of filver, it will be precipitated, and turn milky. It 
is a volatile alkali therefore, and not a fixed one, that 
is contained in this water. 
The folution of filver will not difcover a volatile 
alkali contained in water, but very plainly a fixed 
one. 
A folution of fugar of lead will not difcover a 
fmall quantity of marine fait or fpirit, till we add 
more. 
A folution of fublimate will manifed both a vola- 
tile and fixed alkali. 
IX. ExtraB of a Letter from Signer Camillo 
Paderni, to Dr. Mead., concerning the An- 
tiquities dug up from the antient Hercula- 
neum, dated from Naples, Nov. 18, 1752, 
Tranfated from the Italian. 
ReadRe 3 b ‘ 8> HTHE things, of which I have the 
X charge, are many, and extraor- 
dinary ; confiding of 
_ Metals ; that is, bronzes, filver and gold of all 
kinds, of excellent workmanfhip. 
Beautiful cameo’s and intaglio’s. 
Glafs of all forts. 
Various 
