271 
With f,,=1,8 (f=414)') and p-=1100 atm. the following 
values are further calculated for the temperatures above 880° C. 
oge 10009 P1000 1200°sFIS00e > 14005 T LAZ NE 
pre Wil 274 410 581 187 1029, 1100 atm. 
We can now easily calculate the values of D', from the subjoined 
values of the vapour pressures, on the supposition that the vapour 
is and remains monatomic, and besides continues to follow the laws 
of the ideal gases. 
| a | ome | See 
100° C. 0,28 mm. | 0,000 ©  — = 
gone et? ah 0,0001 = a 
250° TAs ae 0,0005 = = 
300° 246 0,0014 En = 
350° ionen 0,0034 38 fa 
400° 2,06 atm. | —_0,0076 ns = 
500° 8,01" 0,0253 a = 
600° 223°, 0,0624 = ae 
700° KORE ae 0,126 En x 
g00° 1025 0,232 = = 
900° igs 5 0,356 Ls = 
1000° zal ie 0,526 0,55 1,05 
11002 Ee 0,730 0,80 1,10 
1200° ET wih 0,964 1,15 1,19 
1300° Pe, 1,222 1,65 peas 
1400° leden |. 1503 2,60 1,73 
T= 1427° 1100 = p, | 1,581 (4,15) =D, 2,62 
The “found” values of D, have been graphically- interpolated 
from the following values of D,, determined by Miss BENDER. 
£0502 1210°. 1280° 1295 MES 0Re aso" C; 
D010 1,15 1,35 1,65 190 2,50 
1) It appears from this value of f that — at least at temperatures below 
10009 CG. — mercury behaves almost as an ideal substance (for them fe = 4, and 
f <4 below T). 
