��—
�Ckitical State
�Boiling point under atmo- spheric pressure
�Correspond- ing density
�Temperature l
�Pressure
�Density
�so.
01, 00,
CA
NO CH,
o,
CO
N, H,
�155°
140°
31°
10°
- 93°
- 82°
-118° -140° -146° -234°
�78*9 atmo. 93-0 „ 74-6 „ 51-0 „ 71-0 „ 550 „
50-0 „
39-0 „
330 „
15-0 „abt.
�r o-60 \
t 0-65 j
�-153-6° -164°
-181-5°
-190°
-194°
-238°
��The numbers obtained for the last six gases are from researches of Wroblewsky, Olczewsky, or Dewar.
The critical constants are also known for a large number of substances which are liquid at the ordinary temperature. The following are a few of these :
�� �Temperature
�Pressure
�C^joO (Ether)
�. 190°
�36*9 atmospheres
�CS*
�. 272°
�C*H 6 OH
�. 234°
�0,H 5 C1 .
�. 183°
�O.H, . .
�. 281°
�CHOI, .
�. 260°
�HCOOCsHs .
�. 230°
�. 230°
�. 365°
��The determination of the Critical Temperature of a to 1 millimetre thick, a certain quantity of the substance is placed. The open end of the tube is drawn out to a capillary tube in such a way as to leave the completed
1 For the measurement of very low temperatures, see works on physics,
�� �
