4'24 On the Tlieory of Mixed Gases. 



. P...S. Since writing the preGcdii^g letter I 

 have made an experiment, which leads me to 

 agree with Mr. Dalton, in suspecting Schmidt's. 

 accuracy. I desire, however, to keep my judg- 

 ment in suspense, unti]^ his experiments have 

 been repeated by some philosopher,, whose 

 impartiality cannot be called in question. In 

 the mean time, the arguments which have 

 been drawn from his table, must lie under the 

 same suspicion as the table itself ; but this cir- 

 cumstance is of no moment; because It only 

 invalidates a collateral proof, without affecting 

 the principal facts and conclusions. 



J. G. 



