[ 523 ] 
they were faturated with a fixed alkaly diffolved in 
water. 
Four ounces of the acid in experiment II, which 
diflilled into C, took of the alkaline liquor to be 
faturated i 3d 53 2 ’^- 
As much of the water * in experiment II, as con- 
tained 4 ^ of vapour took to be faturated 1^95, 
Four ounces of the acid in experiment III, which 
dropped into C, took of the fame alkaline liquor to 
be faturated 1 2 J 7. 
As much of the water of experiment III, as 
contained; four ounces of vapour •f took to be 
faturated 2ft 6 
Four ounces of oil of vitriol, which was to wa- 
ter in weight as 24 to 13, took of the fame alkaline 
liquor to faturate it £ lb 10 § 75, which fhews that 
oil of vitriol is not fo flrong an acid as the vapour 
of fpirit of fait, when condenfed in water and di- 
flilled flowly, as in experiment III. 
From the foregoing experiments it appears, that 
1 fb of the fpirit of fait vapour, condenfed in the 
water in experiment II, is to 1 lb of the acid of fait, 
which dropped into C of the fame experiment, as 
200 is to 109, which is near double; and therefore 
the 61 b 12^ and 7 of the vapour, which condenfed 
in the water, is equal very nearly to 13ft 1 5 of the 
acid which is diflilled in C : fo that by this method 
of diflillation, this great proportion of acid is faved, 
and thofe difagreeable fuffocating fumes avoided. 
* The water of the two bottles was mixed together; for they 
were of different ftrength. 
4 The water of thefe two bottles were likewife mixed toge- 
ther for the fame reafon. 
X X X 2 
In 
