1072 
2 m, Gn 1 
a : 14 —* le, 
Suaro® ahm,(m,+-m,) 273] 1—#d 
the ratio of which is: 
Din,=9) _ m, 1—d3, 
D(n,=9)  m, 1—9, 
Caleulation gives for the persistence of carbon-dioxide in relation 
to hydrogen 0.942, for that of hydrogen in earbon-dioxide 0.239, so 
that for these two gases the above ratio becomes 0.77. According 
to the theory as corrected the ratio is therefore still much nearer 
unity than according to the uncorrected theory of O. E. Meyer 
which gives @; = 0.045 in this case. As a complete agreement with 
Maxwerr’s theory is in any case lacking, the remaining difference 
between the two limiting values is not of any special consequence 
and no useful purpose would be served by communicating further | 
numerical results. With combinations of gases which differ less in 
molecular weight the difference between the limiting values is smaller. 
The formula for the viscosity of a gas-miature undergoes a cor- 
responding modification. As before the relatiod holds: 
i n 
et ~ 1 a or 2 at 
= 0.385 dnl fy’ + 035 duly 
n 
where /’, and /’, now have the values: 
= C 
eae ie Wa nxs | 1 -+- En lL. x< 0.406 — 
ì 273 
The ete ide which are now found for mixtures of carbon- 
dioxide and hydrogen, and of argon and helium respectively are 
somewhat lower than before, but the maxima which had to be 
explained by the theory remain. For the former pair of gases cal- 
culation for n, =n, —=+4n gives 74 == 0.0001470 (observed 144), for 
the latter pair 4 = 0.0002306 for n, =n, = $n and xj = 0.0002281 
for n,=2n, n,=2n, which results differ even a little less from 
the observed maximum 0.0002207 than according to the former 
calculation. | 
