and at tr active Powers of various f aline Subft antes, 37 
Gr. 
Weight of the box in air - 607,65 
Its lofs of weight in water - 73,75 
Weight of the box and lime in air 1043,5 
Weight of the lime fingly in air - 4 3 5, '85 
.Lofs of weight of the box and lime in water 256,5 
Lofs of weight of the lime fingly *■ 182,3 
Hence, dividing the abfolute weight of the lime by its lofs 
in water, its fpeciflc gravity was found to be 2,3908. 
From thefe data I deduced the lpecific gravity of fixed air in 
Its fixed ftate ; for 100 gr. of marble con fill of 55,92 of earth, 
32,42 of fixed air, and ii,66 of water; and the fpecific gra- 
vity of the marble is 2,717. Now, the fpecific gravity of the 
fixed air, in its fixed hate, is as its abfolute weight divided by 
its lofs of weight in water ; and its lofs of weight in water is 
as the lofs of 100 gr. of marble minus the lofies of the pure 
calcareous earth and of the water. 
Lofs of 100 e-r. of marble: 
100 
2,717 
Lofs of 55,592 gr. calcareous earth 
Lofs of 11,66 gr. water ~ 
36,8 gr. 
554>2 
2 > 39 ° 
- 2 3>39 g- 
1 1,66 
3 5}°5 
Then the lofs of the fixed air 36,8 - 35,05- 1,75 ; cohfe- 
quently,its fpecific gravity is.^j =18,52; by which it appears 
to be the heavieft of all acids, or even of all bodies vet known, 
gold and platina. excepted. 
OF 
