relating to Air and Water. 
2 9S 
Cure of the experiment, will perhaps be thought to be tolerably 
near that of the air. 
If the air be analyzed, the 840 ounce meafurea will be 
found to contain - 168 of uncombined fixed air = 151 grains* 
and 672. impure i inflammable ;= 1 79 
fo that the whole 840 will w T eigh - - 330 
Laftly, if the 672 ounce meafures of impure inflammable 
air be decompofed, it will be found to contain 
164 ounce meafures of fixed air = 147.6 grs„ 
and 508 inflammable - = qo.7 
fo that the whole 672 will weigh - - 178.^ 
which is very near to 179, the weight of the whole together. 
It may, however, be fafely concluded from this experiment* 
and indeed from every other that I made with charcoal, that 
there was no more pure inflammable air produced than the 
charcoal itfel'f may be very well fuppofedto have fupplied. 
There is, therefore, no reafon for deferting the old eftablifhed 
hypothefls of phlogijion on account of thefe experiments, fince 
.the facl is by no means inconfiftent with it. The pure inflam- 
mable air with the water necefl'arily contained in it would 
weigh no more than about 30 grains, while the lofs of weight 
in the charcoal was 94 grains. But to this muff be added the 
phlogiflon contained in 392 ounce meafures of fixed air, 
which, according to Mr. Kirwan*s proportion, will be nearly 
65 grains, and this and the 30 grains will be 95 grains. 
The bafis to this fixed air, as well as to the inflammable, 
muff have been furnifhed by the water ; and from this it may 
be concluded, that the water mull have been fo far altered as 
to be changed into fixed air, which will be thought not to be 
any great paradox, if it be confidered that, according to the 
