EQUATIONS OF FOG CHAMBER. 



59 



10 30 40 42 44 46 48 50 52 54 56 58 60 



Fig. 29. Corrections (p.,- pj for 3p = p p 3 . Table 20. 



Fig. 30. Isothermal pressure p 2 in the isolated fog chamber for different isothermal 



pressures p 3 of the communicating fog chambers and for different volume ratios 



(v/V). Table 19. 



48. Case of saturated air in both chambers. Here all the pressures 

 of both chambers must be reduced by the corresponding pressure of 

 saturated vapor, except p\ where the vapor is slightly superheated. 

 Omitting this the equations become 



o f> -~)c/k- (ft"*) (i+"/V) 



V Fl (/>' - 7T) (fe-C)/* +(p-x) (M/fc . Vl V 



IO {p 2 -7z) = {p-7t)( k - c ')/ k {p 1 -7Z 1 ) C / k 



or the equations again take the original form, though a special computa- 

 tion is needed, since a different initial pressure (p) enters. These results 

 are given in table 20 and in fig. 29. 



Table 20. Corresponding to table 18 when both fog chamber and vacuum chamber are 

 saturated. v/V = o. 064; temperature 20 ; =76 cm.; ir=i.7 



* Observed as soon as possible at the fog chamber. 

 t(pVir)+^(*>2-ir)=( I + iL)c>-.ir) 



