( JA2 ) 
The reservoirs T of the dilatometers were surrounded by a protecting 
jacket KKKK of nickel plate. This jacket was supported by the nickel 
bars LL. The liquid gas was kept in violent motion by the stirrer 
mm. The valves rrrr promote the stirring in a high degree. The 
stirrer is suspended on three wires NN~, which pass airtight through 
the cover BB. To satisfy this condition they pass through the metal 
tubes 00, and through the rubber tubes BP; in the latter the 
wires are fastened airtight. By means of an electromotor the wires 
are brought in an upward and downward motion. 
The liquid gas was pumped into the vacuum glass by means of 
the tube HH. 
When we worked under reduced pressure, S was connected with the 
airpump. 
11. The tables 2—-9 contain the results of the measurements, 
which are used in the calculation. 
TABLE 2. 
Temperature 18. c 0. 
| Weight of the Weight of ' NUIT 
The dilatometer contains solid substance! the pentane 
I in gr. I in gr. 
Diamond—Pentane 
Graphite—Pentane 
White tin—Pentane 
Grey tin—Pentane 
9.9790 
8.7954 
23.7026 
26.4843 
12.0820 
11.6135 
12.7496 
10.5339 
12.8847 
20.2058 
TABLE 3. 
Temperature —163°.6. 
Number of the dilatometer 
The dilatometer contains ., 
Diamond- Pentane 
Graphite—Pentane 
