1 
we 
9° 
27 
with old determinations of 7% and px; hence the critical pressures 
may be inaccurate. As we have already observed above, for the 
compound esters one O in COOX (of OX) = 70, the other (of CO) = 50. 
In the group C,H, C= 75 as in benzene, whereas we find C = 100 
in thiophene. This is rather strange, as in cyclohexane (Hexame- 
thylene), also a cyclical compound, C is very decidedly = 75, just 
as in C,H,. But it is very well possible that the reduction of the 
value from 100 to 75 
ste C-atoms and not of four. 
only takes place in the eyelieal binding of 
e. Some alcohols and amines. 
Found Tj Pp 
“CH,0H =1424 (10 + 34) =246 | <300(X 10-5) 513,1 | 18,5 
*C,H;0H =270-+ 104 =374 | <375 516,2 | 63,0 
*C3H,0OH = 398+ 104 — 003 < 490 536,8 50,2 
*CH;.COOH = 142 + 254 = 396 <4T1 594,7 57,1 
{ NH,CH; = 128-4 142 = 270) } 272 428 12 
| NH,C,H; = 128 + 270 — 398 312? 450 | 66 
| NH.C;H; = 128 + 398 = 526 450? 491,1 50 
/ _NH(CH3), = 94- 284 = — 318 356 436 | 56 
NH(C2Hs), = 94 + 540 = 634 560 ? 489 40 
| NH(C;H7)2 = 94 +706 — 890 814? 550,1 31 
| N(CH3)3 = 60-+ 426 = 486 484 433,5 41 
| N(CjH5)3 = 60 +810 0 812? 532 30 
NH,.CsH; = 128 +520 = 648 | 611 698,7 | 52,35 
Kthyl- and propylaleohol seem to be about normal for 7%, but 
methylaleohol and acetie acid are still considerably associated. In 
the group OH O = 70, H = 34, the first O-atom in COOH being = 50. 
With amines we are struck with the remarkable phenomenon 
that always only the Jower members agree, the higher ones on the 
contrary deviate greatly. Thus e.g. NH,CH, is in good harmony, 
but NH,C,H, deviates 20 °/, and NH,C,H, deviates 15 °/,. It is possible 
that the determinations of Vixcent and CuHappius, (who have also 
investigated the divergent C,H,Cl) are inaccurate, and the critical 
pressures too high. If e.g. for NH(C,H,), we substitute pj, = 35 
atm. for 40 atm, for N(C,H,), pr = 28atm. for 30 atm., and for 
