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} "Experiments in diffolving Lea. VIL. 


Common Sait, 1 marked the fecond afcent of the Oyls and found it to 
be 1o Inthesand 6 eighths. Repeating the Experiment in like manner 
with twe Ounces of Nitre, I found the afcent of the Oyl to be 11 Inches 
and 3th. Repeating it again with two Ounces of Alum, the afcent of 
the Oyl was 13 Inches and 3: And making it once more with Sul 
Armoniac, the Oyl afcended to 15 Inches: the faid feveral afcents of the 
Oyl being the true fpaces which the Four abovefaid Salts take. From 
which, the {pace which the fame Salts take up upon Difolution, be- 
ing dedudted; the remainder is the {pace gained by that Diffolution. 
And fo it appears, firft, that Saf Armoxiac gaineth nothing; being the 
only Salt of all Ihave tryed,which caufeth the equal afcent both of the 
Water and the Oyl fe. juft 15 Inches in both. Alu caufeth the afcent 
of the Oyl to 13 3% of the Water, to 11 Inches and $ths: So that it 
gains about 1 Inch and § outof 13. ytre caufeth the afcent of the 
Oy!, to 11 Inches and 35 of the Water, to 8 Inches and 3th So that 
Nitre by Diffolution gets almoft the {paceof 3 Inches in 11. Common 
Sait caufeth the afcent of the Oy), to1o Inches and sths 5 of the Water, 
6 Inches and 3th» So that Common Salt gains by Diffolution 4 Inches in 
10, which is very confiderable. 
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 Oy/, that Nitre, quantity 
for quantity, is abouta 22th part lighter than Common Salt. Alum 
about a 6 partlighter. And Salt Armoniac, almofta 4th 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 
\e& Volatile s 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 lef fixed is fomewhat lighter. But Alvi which is {till le& 
fixed is much lighter. And Sal Armoniae which is wholly Volatile, is 
the lighteft of all the salts above mentioned. 

C HoAsp, 

