1134 
0 = age eg 70" inal (hHu)' M . . . (23) 
Of these contributions AM, is due to the directing action of the 
quadrupoles, AM, to that of the magnetic dipoles, AM „ to the 
combined action of the quadrupoles and dipoles. They form the first 
terms of developments in ascending powers of h, hence of 7’—. 
§ 4. The values derived in the preceeding § for the influence of 
the above mentioned mutual directing actions on the magnetisation 
become manifest in the susceptibility by the introduction into (2) 
of the terms Agn, Am, Ag. These then become: 
128 n 4 wn 
Ee aoe pee AD 
2205 » 3 KT) kT 
ln 4 Um 8 
A ee ER ree ah oe ee 
75 asen. (=) Ge 
128" n 4 PEEN 
Arle Sg Ee GUL 
q 11025» 3 °° (25) (Gr) sas 
The sign of none of these A’s agrees‘) with that of the A found 
experimentally for liquid oxygen (§ 1). Further A,,, and A,, prove 
to be proportional to 7-2, An to 7-S and also to H*, while the 
observations give no indications of such a dependence of A on 7’ 
and H. 
To form us a better judgment of the magnitude of the influence 
that might be exerted on the susceptibility by the above mentioned 
mutual directing actions we shall calculate, for special circum- 
stances, the values of the above derived A’s for oxygen. For this 
purpose we may take from Comm. N°. 6a §2: vg = 5,7 x 10714 
and 6 = 2,65 « 10-8; further from the same Comm. §3: u, == 2,6 Xx 
2 10-9, so that according to (9): vn, = 3,7 X 10—". 
Let us consider oxygen in the gaseous state at 90° K. under the 
fate the = eee ay Olea te ent ae 
v3 
—16) . Vg — ky Pee : 7 i ain A,,, = — 
10-16) : Uae iT 0.0030. By this we obtain A „== —0,0022, 
Arme 2 C10. 
Hu, 
’ 
When further we put H = 55000, then 
Ag = — 0,002. 
!) That the mutual action of the magnetic dipoles has an effect in the 
opposite direction, has already been remarked by LANGEVIN l.c. note 2 
p. 1128. This result does not agree with that of Gans l.c. note 1, p. 1128. 
= 0,12, which gives 
