| Parts of Water and of Depblogiflicated Air. cee 
with large quantities of thefe two kinds of air, by which the 
effential point feems to be clearly proved, that the deflagration cr 
union of dephlogitticated and inflammable air, by means of 
ignition, produces a quantity of water equal in weight to the 
airs; and that the water, thus produced, appeared, by every 
teft, tobe pure water. As Iam not furnifhed with any parti- 
eulars of the manner of making the experiment, fT can make 
no obfervations on it, only that, from the character you give me 
of the sentlemen who. made it, there is no reafon. to. doubt of 
its being made with all neceffary precautions and accuracy, 
which was farther fecured by the large quantities of the two 
airs confumed. 
3. ** Let us now confider what obvioufly happens in the 
“< cafe of the defiagration of the inflammable and dephlogifti- 
“cated air. “Vheife two kinds of air unite with violence, they 
<< become red-hot, and upon cooling totally difappear. When 
*< the veflel is cooled, a quantity of water is found in it equal 
“‘ tothe weight of the air employed. ‘This wateras then the 
“* only remaining product of the procefs, and water, light, and 
“¢ heat, are all the products,” 
ter fet free which efeapes our fenfes. 
«<< Are we not then authorifed to conclude, that water is come 
<< pofed of dephlogifticated air and phlogifton, deprived of part of 
<< yheir latent or elementary beat; that depblogifticated or pure air 
“< 75 compofed of water deprived of its phlogifion, and united ta 
*< elementary beat and light; and that the latter are contained im 
<< it in a latent frate, fo as not to be fenfible to the thermometer or 
<< to the eye; and if light be only a modification of heat, or @ cir= 
<< cumfiance attending it, or a component part of the inflammable 
“air, then pure or dephlogifticated air is compofed of water de> 
* prived of its phlogiftion and united to elementary heat 2” 
4. * It 
unlefs there be fome other mat= 
