rc 
( 
For solid Oxygen the density at 21° is = 1,4256, hence», = 32: 
: 1,426 = 22,4. The factor by which we must multiply, has the value 
1,5 with m= 21°: 126° ='/, and 7 =0,8, so that 5 becomes 33,6 ; 
i.e. expressed in v,, 33,6 : 22412 = 150 X 10 5. Determined directly 
in I from 7; and px 142 ~ 10-° was found, so that the value of 
Dj, calculated from the solid phase (34° below the triple point) turns 
out only 5 or 6°/, too high. 
The factor by which v, must be multiplied to get bj, is therefore 
very variable, and depends in a high degree on y and m. For metals 
and salts, where 7, lies between 1000° and 3000° abs., y is generally 
in the neighbourhood of t, and then we become: 
bpv A ARP oS ae ile 
in which m varies from '/, to '/, when v, is determined at the 
ordinary temperature (+ 300° abs). The factor, therefore, varies from 
1,7 to 1,9. (The sign of inequality refers to the fact that », of the solid 
phase is generally smaller than the value of »,, which would hold 
at the same temperature with regard to the liquid phase). 
Now at 7, for HgCl,, HgBr, and Hgl, Rorinsanz (Z. f. ph. Ch. 
87, p. 253) has found resp. the values 976°, 1011° and 1072° absolute. 
We may therefore put m= 0,28 or 0.26, “which makes the factor 
Pt 172008 MIE Prom 
hd M 
e= gaar  D, 
follows therefore: 
For HgCl,: 
1,72 2152 
— Ee 0.00384, 
22412 “* 5,424 
hence Hg = 384—230 = 154 & 105. 
For Hgbr, 
se 560.44 
b, =—— X "= 0,00484, 
k= 55419 5,738 
which gives Hg — 484—330 — 154 > 10. 
For Hel, (yellow) : 
giving Hg == 582—440 — 142 X 10%. 
For Hg in compounds we can therefore assume about: 
by == loden EOS, 
For mercury itself we find from the density of liquid mercury at 0°C: 
