52 ANSWERS to the OBJECTIONS 



dently is to have again recourfe to the fallacious argument, aW 

 ready difcuffed, of a cold body cooling a warm body, without 

 being warmed ; and it is to fuppofe a mower of fnow produced 

 in the warm air of the chamber, by the introduction of cold 

 air, without that cold air mixing with the warm. But how is 

 one body of air fuddenly to cool another body of air, without 

 their mixing together ? At leaft, it is as natural for thofe two 

 bodies to be mixed together as to form a medium temperature ; 

 and if M. de Luc is to found an argument upon any of thofe 

 events not happening in that manner, he mould point out 

 fome other reafon for his fuppofing that they do not mix, than 

 that of their forming a condenfation of humidity ; an event 

 which mould happen, according to the principle we have en- 

 deavoured to effcablifh ; a principle which M. de Luc would 

 perfuade us to believe to be without foundation. 



Our author then forms the fuppofition of another ftate of 

 the cafe, in order, no doubt, to put things in a clearer light ; 

 but, without more accurately attending to the circumftances of 

 the cafe than he has done, it has no other effect, in my opinion, 

 than to perplex the fubjecl more and more. He fays, " Si au 

 " lieu d'une fimple ouverture a la chambre, fes parois euffent 

 " ete enleves, et que la made de fon air eut ete ainfi en contact 

 " tout le tour avec l'air exterieur, il s'y feroit auffi forme un 

 " nuage ; mais alors il auroit bientot difparu en s'evaporant, 

 " comme celui de l'eau bouillante difparoit dans l'air qui l'erir 

 " vironne." 



Here M. de Luc does not feem to be fenfible that he is only 

 defcribing what mould actually happen according to the theory. 

 But he had juft now given us to underftand, that he was to ex- 

 plain the formation of fnow or rain, in this cafe, upon fome 

 other principle than that of the proportion which has been 

 now fo fully confidered. How far he has performed that un- 

 dertaking, I would willingly leave to be decided by thofe who 

 may be more impartial judges in this cafe. But left it mould 



be 



