1225 
require revision. Indeed, with OrszewskKr’s second value, viz. pj —= 64 
instead of the first value used by us (which gives better agreement 
in other respects), we should have found hz = 127, in good agreement 
with the calculated value *). 
The abnormal H,O does not seem to be considerably associated 
at the critical temperature. (Abnormal substances are indicated in 
the tables by an asterisk). From Scuerrrr’s researches we know 
already that NO, at 7% is hardly associated to N,O,. 
c. Carbon-hydrogens. 
Found Tj, Pp 
CH, —100+414 — 156 191 (156) OX10-5) 190,2 | 45,6 (53) 
C,H, = 200 + 6X 14 = 284 | 286 | 305,2 | 48,9 
C‚Hs = 300 +8 X 14 = 412 | 377 | 370,6 | 45,0 
n-C‚Hio  =400+10%14 = 540 | 525 [+424 [+37 
n-CsHio  —500 + 12X14 = 668 | 652 | 4703 33,0 
i-CsHi2 =500-+12><14 — 668 | 641 | 460,9 | 32,9 
n-CsHj, = 600 41414 = 796 | 785 | 5079 | 29,6 
n-C7Hjg  =700-+16X 14 = 924 919 | 539,9 | 26,9 
n-CsHig = 800 + 1814 — 1052 1059 | 569,8 | 246 
CH — 200 +2 X 14 — 228 | 229 | 308,6 | 61,65 
CoHy = 200 + 4X 14 = 256 | 255 | 2826 | 5065 
i-CsHyo = 500 + 10 14 = 640 | 627 || 464,7 | 33,9 
CoHe =6X< (15+ 14) == 534 | 537 | 561,6 | 479 
C;Hs — 534 +(100 +214) — 662 | 653 | 593,1 | 41,6 
o-CsHjo «= 662 + 128 — 790 | 780 | 636,1 | 36,9 
Cyclohexaan = 6 X(75 +214) = 618 | 636 553,1 | 39,8 
C,,Hg =O CHI 28 = 862 | 866 | 741,3 | 39,2 
The value 191 found for methane is probably too high in conse- 
quence of the too low value of pr. For this we have, namely, 
1) Prof. Gure is so kind as to inform me that in 1910 Apwenrowskr found 
Tx = 180,2, almost identical with 177,1 assumed by us, but px = 64,6 atm. 
This is really the value, which gives the expected value for by. 
For Cl, Pettaron (Dissertation, Neuchatel 1915) found Tp = 417,1, pk = 76,1 
These values would yield bx = 251 X 105, Vag = 11,5 K 10-2, 
