en | : 
EK, “Pom.Hg PomHe | = AP. mt 107 ee 107 
- 2 | 
89.65 8.485 | 38.86 | 3045.0 bi Tas 399 302,.5 
70.9 6.010 | 39.48 | 2610.0 STAD Sl 316.7 
70.9 8-365.|- 38.01 4), 2301 55 2.056 e202 319.8 
70.9 8.300 | 38.92 | 1834.0 1.614 321.17 32123 
1.107. They were corrected for the change of R*/Z with the 
temperature and for the gliding. The corrected values are in column 
7 under 9.107. 
From Table I we can immediately see the degree of accuracy 
that may be ascribed to the measurements with regard to accidental 
errors. As we have said before the determinations were usually 
made at a mean pressure of half an atmosphere. At and above 
oxygen temperatures a determination at one pressure is sufficient, 
at hydrogen temperatures this appeared to be no longer the case. 
Table I shows that there the viscosity changes with the density, 
and in the same direction as was found by Warsure and Bago for 
carbon dioxide. Our differential manometers were not yet arranged, 
as we intend to do, for working with different mean pressures, and 
the apparatus was thus not very suitable for determining the in- 
fluence of the pressure. In order to perform a few experiments 
with a different pressure, the two differential manometers were con- 
nected to an artificial atmosphere /, as can be seen in the plate. 
For the further experiments which we intend to make (see § 1) 
concerning the dependence of the viscosity upon the density, it may 
appear that where it is a case of relative determinations only, the 
oscillation method is perhaps the most suitable. 
