310 
Also for a more accurate calculation of the values of g for Br, 
and I, (see $ 1) nz must be known. For n, the normal value 2 
can be taken in both cases. *) 
AG ne Papi Dee: 1,048) = 1,048, and a, ; ap ==¢7 : 8,0)’ = 0,766 
for Bromine, we must multiply by the factor 0,803, which would 
render p = 3,20 X 0,8 = 2,6. 
For Zodine, where n,:nz=1,104, a, : a, = (9: 11,1)? = 0,657, 
the correction factor becomes 0,725, so that p becomes = 3,14 X 
OR 25 = Ae: | 
In connection with the value 3,4 found for chlorine, the found 
values are rather small, which would point to this, that the ratios 
ci, zap have been taken too great, because the degrees of dissociation 
have possibly been calculated slightly too high —, unless also for Cl, the 
too high value of War (viz. 5,4 instead of 5) should point to 
a slight dissociation at 7%, through which also here a, : aj, becomes 
pas 
In the group of the noble gases the exceptionally high value 5,26 
for Helium is certainly striking. This value is, however, lowered, 
when we assume that Wa, suddenly becomes very small at so low 
a temperature as 1° abs. — hence presents an abrupt difference 
analogous to that of the electrical resistance at extremely low 
temperatures, as has been found by K. Onnes). 
Of the compounds of Phosphorus we have still examined PCI, 
and POCI,, chiefly with a view to the fact that before (see I) for 
PH, the attraction of the central P-atom was found =0. 
| Ty by, 16 ap 104 | v ap - 102 
PCI 558,6 | 140 +3 115 = 485 347,3 18,6 P=2,4. 102 
POCI, 604,9 140 + 70 + 345 = 555 430,2 20,7 P= Sin 
When we assume Cl—5,4, 0 = 2,7, we find, therefore, for the 
attraction of P in these compounds about half the theoretical fun- 
damental value 5. ‚When we diminish Cl to 5,2, then 2,4 becomes 
3,0 and 1,8 becomes 2,4. In HCI, namely, Cl has been found = 5,2, 
in CCl, even =5 (all this x 10~*)]. Just as the value found for 
S was 0,6 unit lower for SOCI, than for S,CI,, the value of P 
found for POC), is here too 0,6 lower than for PCI, (influence of 
the inserted oxygen). 
1) Prof. P. Durorr had the kindness.to confirm the certainty of this fact for 
Bry, and the high probability for I». 
