302 Experiments in diffolving Let VIL 7 
Common Salt, 1 marked the fecond afcent of the Oy! 3 and found it to 
be 10 Inchesand 6 eighths. Repeating the Experiment in like manner 
with two Ounces of Nitre, I found the aftent of the Oy! to be 11 Inches 
and xt Repeating it again with two Ounces of Alum, the aítent of 
the Oyl was 13 Inches and 3" And making it once more with Sat 
Armoniac, the Oyl afcended to 15 In the faid feveral alcents ofthe 
Oyl being the true fpaces which the Four abovefaid Salts take. From 
which, the (pace which the fame Salts take up upon Diffolution, be- ` 
ing deduéted ; the remainder is the {pace gained by that Diffilution, 
And fo itappears, firft, that Sal Armoniac gaineth nothing 5 being the 
only Salt of all Thave tryed,which caufeth the equal afeent both of the 
Water and the Oy! fe. jut 15 Inches in both. Alam caufeth the afcent 
of the Oyl to 135 of the Water, to 11 Inches and $ths: So that it 
gains about 1 Inch and ¿ out of 13. Nitre caufeth the afcent of the 
Oyl, to 11 Inches and #3 of the Water, to 8 Inches and hs So that 
Nitre by Diffolution gets almoft the fpaceof 3 Inches in 11. Common 
Sut cruferh the afcent of the Oy), toro Inches and ¿ths 5 of the Water, 
6 Inches and ¿hs So that Common Salt gains by Diffolution 4 Inches in tri 
10, which is very confiderable. darth 
12. $. By this way the Specifick Gravity of all kinds of Salts may 
be eafily taken, and the difference betwixt them is fomewhat furpri- 
zing. Forit appears by the Afcent of the Oyl, that Nitre, quantity 
for quantity, is about a 22th part lighter than Common Salt. Alum 
about a 6th partlighter. And Salt Armoniac, almofta 4h part lighter 
than Common Salt, The like eftimate may be made of the Gravity of 
all other Salts. 
13. $. By the fame Experiment it alfo appears, That according to 
the Specifick Gravity of Salts they are many times at leaft more or 
leß Volatile 3 as in the four laft Salts is plain. , For Common Salt which 
of all the four is the moft fixed, is alfo the heavyeft. Nitre which is 
fomewhat leß fixed is fomewbat lighter. But Alum which is (till lef 
fixed is much lighter. And Sal Armoviac which is wholly Volatile, is 
the lighteft ofall the Salts above mentioned, 
CHa 
