[GARVER] THE RANGE OF MOLECULAR ACTION 91 
reliable observers may be made to give values of € which differ over ten 
per cent. For instance, Ramsey and Shield’s ! value for a is -0001 while 
if computed from the specific volume given by Battelli in Winkelmann’ 
the value is -000114, a difference of 14%. 
In conclusion a number of examples in tabulated form are given. 
Two values of € are given, €, computed from equation (D) and € as 
computed from equation (H). Some of the irregularities observed are 
evidently due to inaccuracy in the experimental data. The data from 
which the computations were made are given fully in order that the 
effect of introducing other experimental values regarded as more reliable 
may be tested. 
I. TABLE OF COMPUTED VALUES. 



































Temp- Molecular Range | Surface-tension 
; erature) in cm. X 10° in atm per sq.| Intrinsic 
Name of Substance.| €, | em. cross-sec- 
: TRE Tone Pressure, p> T 
ë, 2 y= 26 in atmospheres 
0) eran. 102008 1236 1236 
20 | 2-62 2-63 1328 1324 
NVATER PR io toon | 
60 2e16m 2-435 1470 1485 
100 1S) a We 1580 1620 
DON 2am a) ara! 392 396 
Ethyl1 alcohol.......-.. | | 
80 1-76 1-76 461 461 
2001-06 |) 1-98 587 593 
Methyl alcohol.........| 80 | 1-33 | 1-23 621 669 
100 1-19 1-06 612 680 
20 3-21 | 3-12 380 389 
Methyl] formate........ 60 2-31 | 2-21 397 414 
100 1-66 1-47 377 433 
Ethylether" - 20 3°74 Seal 5 217 232 
Benzene te ere 80 3°35 3°33 295 299-5 
Chlor-benzene......... 150 3-09 2-95 282 296 
— | ln = à 
Carbon tetrachloride....| 20 | 5-40 | 5-12 234 247-5 
Carbon bisulphide......| 19-4 | 4-07 | 4-17 407 399 
MencCunyae een OMIS ere OM MEN ERP RErE 1525 

1 Loc cit. 
> Loc. cit. 
