544 On the Constitution of mixed Gases; ee 
will occupy m-+n measures of space. The par- 
ticles of A meeting with no repulsion from those 
of B further than that repulsion which as .ob- 
stacles in the way they may exert, wou!d instant- 
ly recede. from each other as far.as possibléin 
their circumstances, and consequently arrange 
themselves just the same as in a void space; 
their density, considered abstractedly, becoming 
a , (that of the compound being supposed 
m+n 
unity). In like manner the particles of B must 
recede from each other, till they become of the 
n 
density pL thus the two gases become ‘rare- 
7 ; 
fied to such degree that their united forces only 
amount to the pressure of the atmosphere.—Here 
the particles of one fluid not pressing at.all upon 
those of the other, the consideration of specific 
gravity does not enter. That part of the atmos- 
pheric pressure which the fluid A sustains, will be 
m 
wea and the remainder, 
ephek 
aces the part that 
the fluid B sustains, _The weight or pressure 
upon any one particle of any fluid mixture of 
this sort will arise solely from the particles of its 
own kind. 
It is scarcely necessary, I think, to insist upon 
the application of this hypothesis to the solution 
of ‘ali our difficulties respecting the constitution 
of. mixed gases where no chemical union ensues. 
