( 29a ) 



AN ESSAY 



THEORY OF MIXED GASES, 



AND THE 



STATE OF WATER IN THE ATMOSPHERE. 



BY 



MR. JOHN GOUGH. 



COMMUNICATED BY DR. HOLME. 

 Read Nov. 4, iSoj. 



JH OUR essays appear in the fifth volume of 

 the Memoirs of the Literary and Philosophical 

 Society of Manchester, which contain many 

 new ideas relating to the constitution of 

 mixed gases, and the state of water in 

 the atmosphere. The design of these papers 

 is evidently intended to remove certain diffi- 

 culties which must strike every man of science, 

 who happens to peruse M. de Luc's theory of 

 atmospherical vapour. This attempt has the 

 double recommendation of ingenuity and 

 noveltv ; but the leading opinions of the 

 system, even in its present form, are liable to 

 several objections, which I am going to point 

 out, being generously invited to undertake the 



