Royal 
SOCIETV; 
^69 
S 3^^. 
5 5gr. 
The areometer full of mercury 7 ^ ^' ^ -^ ^^^^^^,5 
in the fummer rime S ^ 
II 32 
Full of oil of tartar — — 
I 3 8 ^ -- 
I 3 31 
Spirit of urine — — — 
I o 32 — ' 
I 45 
Oil of vitriol — — - — 
I 3 58 
^ 6 5 
Spirit of nitre — — — 
I I 40 — -^ 
1 I 70 
Aquafortis — — — — 
I I 58 — — 
I I 55 
Vinegar — — — — 
7 55 *-- — 
-] 60 
Spirit of wine — — — 
<J 47 — — 
6 61. 
River-water — i — — — 
7 55 — — 
7 57 
Diftilled water — — — 
7 50 — — 
7 54 
This empty araeometer, weighs one drachm, and twenty 
eight grains. 
'By this table it appears that all liquors, and even mer- 
cury itfelf, are condenfed and rarified in cold and hot wea- 
ther. 
M. Homherg fays, that acid fpirits are no other than a fait 
diffolved by a little water, its tafte as well as its effefls /hew- 
ing It to be an acid; he calls it volatile, becaufe it is raifed by 
the fire with the phlegm, and can hardly be feparated from it 
and reduced into a dry form 5 he has /hevyn the way to know 
the quantity of fait contained in a determined quantity of acid 
fpirit^ viz. by comparing the weight of its volume, with the 
weight of another fpirir, of which the quantity of fait contain- 
ed therein was known 5 firft, he poured upon an ounce of fait 
of tartar well dried, as much acid fpirit (the volatile fait 
therein contained being known ) as the fait of tartar could take 
up, then he evaporated all the infipid phlegm out of this, and 
he weighed the matter 9 the quantity of irs weight, above 
that of the fait of tartar before faturation, is the quantity 
of volatile acid fait, which has been taken up by the ounce 
of the fak of tartar ; here is the table of the quantity of acid 
neceffary to the perfefl impregnation of the fait of tartar; and 
by the fame means the table of the quantity of acid volatile 
fait, contained in an ounce of feveral acid fpirits ; for the per- 
fect impregnation of one ounce of fait of tartar, there was 
poured upon it one ounce, two drachms, ^6 grains of the 
Ipirit of nitre ; the weight of that fait after the evaporation of 
the infipid phlegm was encreafed to 3 drachrns 10 grains above 
an ounce; that mcreafe from the acid remaining in the laltof 
tartar, lliews that an ounce of fpirit of nitre contains two 
drachms 
