Measured methane vapor pressures
T(K)     P(bar)
31.07   1.21e-12
32.06   3.39e-12
33.05   9.12e-12
34.05   2.45e-11
35.05   6.51e-11
36.05   1.74e-10
37.07   4.06e-10
38.07   9.60e-10
39.09   2.41e-09
