relating to Air and Water, 295 



ture of the experimenr, will perhaps be thought to be tolerably 

 ikear that of the air. 



If the air be analyzed, the 840 ounce meafures will be 

 found to contain - 168 of uncombined fixed air = 151 grains. 



and 672 impure imflanamable =179 



fo that the wdiole 840 will weigh - - 330 



Lailily, 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 - - = 30.7 



fo that the whole 672 will weigh - - ^1^'3 



which is very near to 179, the weight of the whole together. 



It may, however, be lafely 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 itfelf may be very well fappofed to have iupplied. 



There is, therefore, no reafon for deferting the old eftablilhed* 

 hypothefis of /'y^/^^^i?^ on account of thefe experiments, fince 

 the fa6l is by no means inconfiflent with it. The pure inflam- 

 mable air with the water neceflarily 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 muft be added the 

 phlogifton contained in^ 392 ounce meafureS' of fixed air,, 

 which, according to Mr. Ki swan's proportion, will be nearly 

 6^ grains, and this and the 30 grains will be 95 grains. 



The bafis to this fixed air, as well as to the inflamxmable, 

 miifl: have been furnifhed by t\iQ water y and from this it may 

 be concluded, that the w^ater muft 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 



latefli 



