412 
MR. E. H. GRIFFITHS ON THE VALUE OF 
As mentioned (p. 394) the resistance of the coil when innnersed in pentane was 
ascertained. The observations were taken in the same manner and with the same 
rate of stirring as those whose residts are given in the above tables. 
Table XIV. 
c°. 
Determination of R in pentane. 
R at (17h. 
True ohms (after 
“plug” and bridge 
coi’rections). 
13-632 
8-.5.0513 
8-54195 
14-010 
8-56516 
8-55197 
14-982 
8-59544 
8-582-23 
16 202 
8-62941 
8 61612 
17-161 
8-65892 
8-64557 
18-214 
8-69058 
8-67699 
19-164 
8-71857 
8-70506 
20-502 
8-75805 
8-74443 
21-702 
8-79354 
8-77989 
23-001 
8-83186 
8-81812 
24-699 
8-88218 
8-8G836 
24-699 
8-88204 
8-86822 
24-713 
8-88275 
8-86891 
The residts must be compared with those in Table XIII., since the observations 
were made after the change in the coil. 
In order to find what difference, if any, was caused by the change from water to 
pentane, the values of R in water at the above temperatures were taken from the curve 
plotted from Table XIII. 
large scale curves. No purpose would be served by reproducing auy of these curves in this paper, 
because if drawn on a small scale they -would be useless and misleading ; for they would give an exag¬ 
gerated idea of the accuracy of our results—the discrepancies being imperceptible. In every case we 
give data by which the curves could be reproduced, and where any marked departure is shown by au 
individual observation we mention it. 
