Table 3. Values of the constants for the helium vapour-pressure Eq3 (3), and the temperature range for which each equation, identified by its set of constants, is valid.
	3He 0.65K to 3.2K	4He 1.25K to 2.1768K	4He 2.1768K to 5.0K
A0	1.053 447	1.392 408	3.146 631
A1	0.980 106	0.527 153	1.357 655
A2	0.676 380	0.166 756	0.413 923
A3	0.372 692	0.050 988	0.091 159
A4	0.151 656	0.026 514	0.016 349
A5	-0.002 263	0.001 975	0.001 826
A6	0.006 596	-0.017 976	-0.004 325
A7	0.088 966	0.005 409	-0.004 973
A8	-0.004 770	0.013 259	0
A9	-0.054 943	0	0
B	7.3	5.6	10.3
C	4.3	2.9	1.9