| Increase 
( 40 ) 
| 5 is Mercury temp. | Expansion. Length Bore. | 
fed | | | 
| n 3.937 | 39,07 | 0.001885 1.55 0.0012? | 
0 | 3.958 go 0.001674 1.40 | 0.0012 
As during the calibration discussed, the mercury was standing in 
the capillary at 1.6 c.m. distance from the reservoir, we must sub- 
tract from all volumes found 3.938 + 1.6 X 0.0012! = 3.940 c.c. 
Then we find: 
5: Height | Volume |Exact Volume 5 it fromlevell tube from 
% |meniscus./meniscus.| to level. z to | capillary to 
= = mark. mark. 
a | 0.101 0.030 185.308 | 0.079 | 181.442 
b 0.114 | 0.035 184.672 0.631 0.5075 0.051 | 180.783 
Cc 0.109 0.033 183.716 0.956 0.5067 0.052 | 179.828 
d 0.100 | 0.029 182.447 1.269 0.5041 0.055 178.562 
e 0.143 | 0.047 50.279 0.101 46.440 
7 0.105 0.031 48 .454 1.824 0.5033 0.078 44.592 
g 0.120 0.037 42.413 6.041 0.5032 0.069 38.542 
h 0.116 | 0.035 39.293 3.120 0.5017 0.071 35.424 
t 0.115 0.035 34.296 4,997 0.5053 0.104 30.460 
0.130 | 0.041 31.598 2.698 0.5039 0.058 27.716 
k 0.092 | 0.027 27.843 3.755 0.5064 0.077 23.980 
Z 0.087 | 0.025 24.493 3.350 0.5094. 0.065 20.618 
m 0.108 0.033 22.695 1.798 0.5100 0.095 18.850 
n 3.938 
Correction for the closing capillary 0.002. 
For each tube a calibration curve can be drawn, belonging to 
one or more calibrations. In order to keep always the same accuracy 
of representation, I have drawn as abscissa a length and as ordinate 
a mean bore, namely those which we should get if the reservoirs 
were replaced by tubes of the same mean bore as the tube consi- 
dered; the “reduced” length drawn is then the distance from the 
