430 
the theory of rigid spheres without attraction, should show the 
tigure 1,000 at each temperature, gives results taken from the obser- 
vations of Markowski') and of KorscH*); in column 3, bw is the 
7 
ee 3 
quantity which, multiplied by the factor > >> gives the collision 
a Uv F 
virial; in accordance with the splitting indicated in Suppl. N°. 245 
§ 6 of the whole virial of the mutual forces between the molecules 
into the collision virial and the attraction virial, bwoec./bw is cal- 
culated from *) 
Rae anes et | ce en 
nn |! + aif (ha) + 57 9 (hv)* + 7 (40) a ak Gk 
(for q,,q,-.- see Suppl. N°. 245 $6), or 
29 
11025 
(hv)’... (8) 
1 get 
Ld 5 (he) +5 (le)! + 
b y— i. TO 
Although the theory of viscosity, and, in particular, of the 
influence of molecular attraction upon it, is not yet sufficiently 
worked out to draw quite certain conclusions therefrom, yet comparison 
of these two columns seems to show that the behaviour of hydrogen 
above O° C. is in pretty good agreement with that of a system of 
rigid spheres of central structure each with an electric doublet of 
| ex Wa Tooc bwooo 
| t Yo00C LT bw 
hydrogen const. doublets 
184.2 1.408 1.104 | 
100.5 1.058 1.074 | 
0 1.000 1.000 
= 8.78 0.940 0.865 | 
9 ok De =] 0.827 0.236 | 
constant moment at its centre, but that below O° C. it deviates con- 
siderably therefrom. Comparison of hydrogen and argon shows that 
1) H. Markowski. Ann. d. Phys. (4) 14 (1904), p. 742, 
2) W. Korscu. Diss. Halle 1909. 
3) For the corresponding aw we obtain a series with only odd powers of hu 
beginning with the first; the first term is consequently proportional to 7—! (cf. 
Suppl. No. 23, Nr. 48c) while the subsequent terms become small with compa- 
rative rapidity. 
