f 5 2 4 ] 
In experiment III, ifc of the acid vapours, 
which condenfed in the water is to i ft of the acid 
of fait which dropped into C, as 131 is to 50 or as 
2 3 1 to 1 ; and therefore the 3 lb 10 l of acid va- 
pours, which condenfed in the water, is ahnolt 
equal to 9ft and 7 °f wliat mt0 J* . 
It further appears, that the flower the diftillation 
is conducted, the more concentrated are the acid 
vapours that condenfe in water. In order to ee 
whether there was any difference in the ftrength of 
the acid vapours, which were condenfed in the 
water from the firft to the laft of the diftillation, 
the following experiments were made. 
Five pound of common fait, with 5 th of oil ot vi- 
triol were diftilled in a tubulated retort, and three 
bottles with an equal quantity of water in each 
were made ufc of to condenfe the vapouis. 
The firft bottle increafed in weight 3 3, and 
during this time, which was twelve hours, there 
was no fire under the retort; that bottle being 
taken away, another bottle put under, a fire was 
made; this bottle increafed in weight 1 lb and halt 
an ounce, the third bottle increafed 10 g and a half. 
As much water of each of the three bottles as 
contained one ounce and a half of the acid fumes 
was faturated with an alkaly diffolved in water. 
The water of the firft bottle took 
to be faturated 1 1 5 2 * 
The fecond bottle took up 10 a 2 3 
The third bottle < # 10 5 x 3 
An ounce and half of oil of vi- 
triol, which was to water, as 226 to 
1 1 8 nearly, took up of the fame alkaly 75 3 
dram. 
29 
3 
By 
