116 
TABLE III. 
= = 
C, xX 106 k Jelle ee E,X108) F,X< 107 | 
6 A, = Ek eee at —— 
According to VII. A. 3. 
tks | | . | 
+ 20°.00 | 1.0731 | + 0.29747 | | | 
| 
| 0.00 | 0.99986 | 25440 
— 103°.01 | 62271 | 0.072156 | +0.31445 | —0.1373 | + 40.29 
— 141°.22 | 48281 | 39576 | 28409 | 0.03754 | 12.51 
— 182°.60 | 33131 | 58524 12718 2409 | — 4.190 
— 200°.08 | 26731 | 96581 11124 | 4293 5.666 
— 208°.10 23795 | 0.12219 0.081145 | + 0.04550 | 5.367 
— 213°.08 | 21971 | 14073 60843 4599 4.836 
— 217°.52 20345 | 15882 | 41215 | 4576 4.160 | 
$ 4. Discussion ana comparison with other observations. The 
differences between the pv4-values calculated from these equations 
and the observed values are represented graphically in fig. 2 as 
functions of the densities d4, the ordinates being the observed minus 
the calculated pv 4-values, expressed as percentages of the latter. In 
this manner the character of the deviations is more easily grasped 
than would be the case, if the numbers were given in the tables. 
The correspondence between the new and the old series is very 
satisfactory on the whole; only in the isothermal for — 217°.52C. 
a marked deviation may be noticed. Whereas for the isothermals 
of —200°.08 C. the deviations of the observations from tbe most 
closely corresponding formula (method c) are within 0.1 °/,, differences 
of almost '/,°/, occur in the isothermals for — 217°.52 C. 
The differences between the various sets of ABy-values obtained 
on this occasion from the smoothed B4-values according to VII. A. 3, 
viz. AB4 = BF (cale.) — By (VII. A. 3) are represented in fig. 3; 
the corresponding deviations of the B4-values obtained by Carr zat 
one of us!) from measurements at low pressures are included in 
the figure. 
1!) P. G. CarH and H. KAMERLINGH ONNES, Comm. NO. 152e, presented to the 
Meeting of the Academy some time ago and shortly to be published in the 
Proceedings; preliminary values are given by P. G. Carn, Dissertation, Leiden 
LOL pwc7. 
