I 476 ] 



and fo much the lefs perfed as it is nearer to faturation with 

 moifture. 



3^. As heat increafes, and cold diminishes the folvent power of 

 air, it follows that the quantity of moifture in both cafes remain- 

 ing the fame, its non-conduding power is in dired proportion to 

 its heat. 



4*^. Mere vapour is a conduElor eledricity, and fo much the 

 mx)re perfed as it is hotter ; and moreover, it contains and appro- 

 priates a confiderable proportion of the eledric fluid. 



5^*. Vapour diffolved in air forms, as already faid, a compound 

 which poffeffes the non-conduding property in the dired ratio of 

 its heat and the inverfe of its proximity to faturation ; this com- 

 pound involves alfo a confiderable portion of the eledric fluid pro- 

 portioned to the heat of the vapour in its nafcent ftate. 



6^. Vapours feparated from air, through whatever caufe, form 

 clouds and foggs, as already mentioned. In the firft ftage of their 

 coalefcence, the minute particles of which thefe confift, retain, in 

 the form of eledric atmofpheres furrounding each particle, a con- 

 fiderable proportion of the eledric mattar which they previoufly, 

 involved in their combined ftate, and fo much the greater, as they 



contained 



