( 623 ) 
é F ; PVA é ‘ ‘ < 
Finally, a diagram of the ~—, d4 isotherms is added to this paper’). 
J > tee) T | | 
§ 7. Individual virial coefficients.’) 
An attempt was made to represent the isotherms by the empirical 
equation of state 
Bea NG ens Jl | Ea 
wd ag amat ab | Po 
13 NEDER ee DA ee 2 i 
| Fa 
and to evaluate the individual virial coefficients. 
Seeing that we could not avail ourselves of measurements at such 
small densities as was the case with hydrogen and hence could not 
calculate values of A4 for each individual isotherm from the obser- 
vations, the calculation was made by means of the equation 
Aap= Ag (1 + 0.0036618 6) 
A aA 
was first calculated as accurately as possible from 
AA G= 1 — BAG Cao 
mince. ior pi, VAg=1 and Dao ete. may be made —0) and 
O 
Individual virialcoefficients of argon. TABLE II. 
t 5 a 105.B , | 10°.C 4 | LOED J | IONE 4 10°F 4 
SSS SS 
| | 
209.39 | H4.07545| —0.6027! | +0.66360 | +4 32836 
09.00 | +1.00074 —0.73969 | +9.00487 | +3 0963 | 
—57°.72 | +0.78922| —1.30460 | 441.64016 | —0.67139 | | 
| —87°.05 | 0.68174, —1.63002 | 21271 | —2 83014 | 410.5566 
—1029.51 0.62511, 1.81649 42.98125  —4.10121 | 410.4013 | 
—1090,88 | +0.5810, —1.92881 | 257060 „16310 | 410.3251 | 
2.40001 | +40.2947 
1152.86 | 0.57617 —2 03892 | +2.74407 | 2.45810 | 410.2837 | —2.35600 
| 
N 
t 
—113°.80 | +0.58372) —1.97263  +2.36239 
| —116°.62 | +0.57340) —2.02273 | +9.56235 | —1.20499 | +10.2806 | —2 31432 
—119° 20 | +0.56393) —2.04406 | H2.31445 | +0.65126 | +10.2759 | —2.17669 
| —120°.24 | +0.56012) —2.05472 | 2.50248 | —0.67214 | +40.2764 | —2.12239 
| | 
—1219.21 | 40.55658) —2.°5084 | H2.37741 +0.13359 | 410.2783 | —2.07246 
| | | | 
1) Fig. 4. 
2) Proc, June 1901. Comm. N°. 71. 
