221 



At 407.19 atins. {^Oi)y<^ [.'óbl'S) ilie series of observations ha\'e 

 now been I'educed in agreement witli each oilier. 



From these eqnations we calcnlate first (lie prodnct PV for tlie 

 densities 100, 200. 300, 400, and 500 for so far as the corresponding- 

 pi'cssnres lie in tlie region of observation of tiie series, and hence 

 agreement may be expected. We tiien tind : 



Besides with the mutual agreement, we are struck here with the 

 agreement of the mean values P F with those determined provisionallv. 



We reproduce therefore this part of the table and place the mean 

 values FV{3I) by the side. 



D 



PViS) PViP) PV{M) 



100 

 200 

 300 

 400 

 500 



1 . 1492 

 1.2457 

 1.3621 

 1.4983 

 1.6544 



1 . 1486 

 1.2427 

 1.3573 



1.1491 

 1.2427 

 1.3573 



1.4963 j 1.4963 

 1.6654 I 1.6648 



It remained to draw up an equation which satisfies the last table 

 of the mean values with (7=1.07258 in accordance with S(itat,k\vi.ik"s 

 isotherm. This final equation drawn up for convenience with five 

 virial coefficients, becomes: 



{F). PV= 1.07258 + 0.0,6763/) i 0.0,882iöB"- f 

 + 0.0,,66954Z>^ —0.0,,lblB\ 



