[ 530 ] 
ni Part of a Letter from Mr GeofFtcy, F. R. 
to J)r Sloane, concerning the exaSl quantity 
of acid Salts contained in acid Spirits. 
Pam^Jme lo. 1699. 
T Believe M. Mo?^ro has written to you, what has 
been done in our publick meeting the 29th of Aprils 
in the Kings Palace called the Louvre^ where fince that 
day we meet weekly, therefore I fend you only a fhort 
account of the difcourfe of MtHomberg.ChymWc of the 
Academy, his difcourfe was concerning the exaft quan- 
tity oi Acid Volatile Salt contained in Acid Spirits. And 
firft he gives an account of the exaftnefs required in 
Ghymical Operations, nof only in the quahty of the 
matters) which are to be mingled, but alfo.in theit 
quantity and dofes, and for v/ant of that exaftricfs very 
often the experiments do not fucceed^ We have : ffays 
he) , a very fure way for meafuring the quantity of fo- 
Jids, by balances and ■ ordinaiy weights,, but we can- 
not come to the fame precifion in Liquors 5 and yet 
lefs, we can't know the precife quantity- of the diffe- 
rent matters contained in thofe Liquors, as what is the 
quantity of Acid Volatile Salt contained in Acid Spi- 
rits, for that purpofe he has contrived a new Araeome- 
ter, or a meafure^of Liquors, of which here is the de- 
(criptixjft:: 1 1 
A fig.i; is a glafs Bottle like a little matractum^oi which 
the neck B C is (o fmall that a drop of Water therein 
takes up the fpace of five or fix lines, near that neck is 
a little Capillar tube D about fix lines long, and paral- 
lel to the neckB C, in the opening B is a little dilated, 
fafhion of a tunneJ,for pouring more eafily the Liquors 
in the Bottle, and the little tube D is forgiving a way to 
to the a*r contained in that Veflel to go out when the 
Liquor is poured in B, the point C is a little mark at 
• the (ame height as the end of the little tube D. 
When 
