278 
§ 4, in which we found for D, (found): D, (Mariorrr) the value 
2,62 : 2 = 1,31, when n is practically — 2 at 7. The great decrease 
of s’ is, therefore, almost exclusively owing to the exceedingly great 
increase of p. with comparatively little changed value of 7’, and of 
Ve. (the latter in consequence of a slight modification in the value 
of 7). 
8. Calculation of 46 and z, and of a. and b, from the 
given Values of Tp, and v.,. 
If 7, = 1700. (abs.), p, = 1100 (atm), and: », Son 
according to (1), we find for s/ =s:n the value (cf. also the table 
in $ +; on the supposition, therefore, that n at 7’, is not far from 2): 
1700 : 273,1 
* = 1100 X 215,7.10-5 
From (4e) follows for 0, the coefficient of RT, from 
84 
-3=1312 .”. > a 
the value 
07 27 s' 
6= we ee 
1 1 rs 
en ( -=) sr — 1) 
aoe ee y—l 
With s’ 1,312 we find from this the following values for dif- 
ferent values of r. 
r=2 io 1,8 157 1,6 1,5 
0—1,368 1,317 1,260- 1,194 -1,108 1,005 
The factor 4 becomes, therefore, smaller as » is assumed smaller, 
which also follows immediately from the formula (0), if only 7< 3,05, 
which is of course always the case. It also appears from (6) that 
6 becomes smaller, if 2 should be < 2, for then s’ = s:n becomes 
greater. 
Then is found for the factor z at pc: 
86 27 
SSS See oe (c) 
rs rs 
r—] 
yielding 
ae 1,9 KB lee? 6 mes 
wv =4156 4.9965 LIGA ATL ET 
Hence the factor a increases with decreasing 7, as long as r 
remains >1,74 (a = 4,277). For smaller values of a decreases 
again. 
