( 956 ) 
obtained from the mean equation of state (see $5\, is probably due 
to an error in the experiment; we have been able to trace a probable 
cause that would afford a complete explanation of its occurrence. 
As for the temperature — 120°.4C., it is in the neighbourhood of 
the critical state and ought not, therefore, to influence our conclusions. 
We come, therefore, to the conclusion that the diameter for oxygen 
is to a high degree of approximation rectilinear. The liquid densities 
differ very little from the values given by Derwar’s experiments and 
by those of Bary and Donnan. It should also be noted that the values 
we have found for bg, Va, and oe; are almost identical with the values 
ba = — 0,002264, 6, = — 0.800, 0; = 0.4387, 
deduced by one of us (KE. M.) from Werosrewski’s measurements at 
low temperatures. 
It may be noticed in conclusion that the critical virial quotient 
was found to be 
3 RT, 
Kk, 3.346 
PkUk 
a value that is smaller than those for all normal substances of 
higher critical temperature (see Kurnen, Zustandsgleichung p. 60) 
which run from 3.4 to 3.9; hence oxygen approximates more than 
any of these to the value given by van pur Waats’s equation of 
state; 2.67. 
Chemistry. — “The nitration of aniline and of some anilides”. 
By Prof. A. F. Honneman, J. C. Harroes and T. VAN DER 
LINDEN. 
‘This communication will not be published in these Proceedings). 
(March 28, 1911). 
