Vji the Theory of Mixed Gases, ^^qi 



to. assume unother character. It has also bceji 

 proved in a former paragraph, that tlie two 

 Huiils \vill act upon each otlier in the manner of 

 clastic bodies, even when the heterogeneous 

 particles are suppos(;d,to be mutually inelastic; 

 consequently A and B will beg'ui to obey thje 

 the law of their specific gravities, as soon as 

 their centres of gravity are separated by intro- 

 ducing into the iipace occupied by C, a freah 

 rjuantity of A or JB; in consequence of this 

 alteration the centre of gi'avity of the heavier 

 fluid will begin to descend while that of the 

 lighter moves upwards. When once tl>e 

 centres of two gases are placed apart their se- 

 paration will become permanent ; because 

 when at a distance they are urged in opposite 

 directions by a force resulting from the dif- 

 ference of the specific weights of the two fluids; 

 and this contrariety of efforts must continue so 

 long as the two centres are disjoined; con- 

 sequently this opposition of force must be last- 

 ing ; seeing nothing can put an end to it but 

 an union, which it will always prevent. Nor 

 can the mutual repulsion of the constituent 

 particles of each gas considered apart, in an^* 

 manner promote the junction o( the ci^iatres of 

 gravity oftiie two fluids, because the action 

 and fraction jpf.a,,n;urabcr ofj bodies amongst 

 themselves do not alter the state of their com- 



