29() 
[For H, we should have found 2y = 1,2148, y=0,607 by 
means of this formula, with V 31,95 = 5,65. With D, =0,07709 (v, = 
— 58,3 « 10-5) this value would, however, have yielded much too 
high a value for dz]. 
For He with m= 1,48: 5,20 = 0,285 (7 =—1,48 lies above the 
triple point temperature, but is the lowest temperature at which a 
density determination has as yet been made) we get : 
0,543 
| ea 1,087 ] — —_ 
| 1,543 
As v=122,1 x 10— is found from D = 0,146, we find the value 
119%<10— for bj, 105 > 10-5 having been found directly from 7%, 
and pj. Hence the given value of D at 1°,48 (absolute) is probably 
0,285 | == 4,087 (-— 0,100) = 0978: 
somewhat too low. 
If we calculate the value of f,, whieh would correspond with 
the probable triple point (+ 1° absolute), we find with m, = 0,192: 
Foz 087 EL 05852 0,192} SS 1087 (f—.0,06 77 jt Obat 
As uw, = 5,20, we find for He (approximately): 
Fa B= LOL a Se LO = 5,27. 
c. Neon. 
„We again calculate the coefficient of direction of the straight 
diameter from formula (2), giving with W45 = 6,708 for 2y the 
value 1,2549, hence y = 0,627. 
We then find for f, with m, = 24,42 : 45 = 0,548 : 
En Gein ie eA hy ae 
Jp aap) ke 5 S< 0,543 ==1,255 (1000092 
For bx (from D, — 1,251, v, = 72,1 X 10-5) this gives the value 
71,5 X 10-5, 71 « 10-5 being found directly from 7; and pz. 
For uw, we find 1,84, so that we get for /, xX fy: 
FX u, = 0,992 X 1,84 = 1,83. 
d. Argon. : 
Experimentally y=0,745 has been found (formula (2) would 
have yielded 2y == 1,4663, y= 0,733 with 150,65: = 12;27 eas 
that we find with m, = 83,79 : 150,65 = 0,556 : 
0,745 
f, = 1,490 |: Se aD 556 — 1,49 (1 — 0,237°) = 1,136. 
12745 
The density at the triple point is 1,418, from which follows 
v, = 126,1 x 10-5. Hence bp =v, x f, becomes — 143 «'10-*. 
(Directly from 7; and pj was found 144 x 10~°). 
Further is 
f, X u, = 1,136 X 1,80 = 2,04. 
