336 



AtTZyDlX. 



pheres ; from thence the pressures are now calculated to 350 atmos- 

 pheres by their formula, viz. : — 



t=A/e 



1 



•7153 



where e represents the pressure in atmospheres, and t the temperature 

 above 100^ of Centigrade. In this equation each 100^ of Centigrade is 

 represented by unity. 



In reducing these temperatures from Centigrade to Fahrenheit's scale, 

 where the fractions amount to -5, they have been taken as the next 

 degree above, and all fractions below -5 have been rejected. 



TABLE II. 



TABLE of the quantity of Vapor contained in Atmospheric Air, at 

 different Temperatures, when saturated. 



*4^* The above Table is computed from Dr. Dalton's Experiments on 

 the Elastic Force of Vapor. 



