Paseet i 
its {pecific gravity is 1,500 nearly, and the fpecific gravity of the 
pureft marine acid in its condenfed {tate is 3,03 *. 
I covip not obferve whether the abforption of this air pro- 
duced heat; moft probably it did, but this is no proof that the 
condenfation was greater than that found by calculation. 
Tue fpecific gravity of the ftrongeft marie acid that can 
eafily be procured and preferved is 1.196. 100 parts of this will 
be found by calculation to contain about 49 of that whofe {pe- 
cific gravity is 1,500, and which I call the ftandard of the 
marine acid. The error arifing from condenfation will fcarcely 
exceed 1 or 1,5 grs. per cent.; by mixing this fpirit of falt with 
different proportions of water I have had the refults from which 
the enfuing table is calculated. 
Table 
* Let D= the denfity of a mixture, m the weight of the denfer ingredient, d its denfity, 
/ the weight of an equal bulk of water, and m’, d' and / the fame elements of the rarer. Then 
oor 
pat In the above cafe m-+-m'=20, and /4-/=13,3, then p=? =1,5. 
Ar 1333 
Now to find the fpecific gravity of the condenfed marine acid air, the denfer ingredient, we 
i rT) 5 m 10 2 4 
have from the above equation, jai i cee tb and d= , =—-=3,03, which dif- 
q D 15 3232 acre 3:03, 
fers but little from the refult in my firft paper. But a miftake of mere imadvertance had crept 
into the fubfequent calculation, 1562 having been taken for 1502, and in confequence 122 was | 
inferted inftead of 62. Thus inftead of 1562—1440=122, it fhould be 1502—1440—=62. 
Then m'=1440. /= srg TINTS m=62. t= 5? = 20, then D or the denfity of the 
? : ? 
: = oO =1,256, nearly the fame as in my firft paper. 
? 
mixture = 
