“…Figure 2 shows experimental points of maximum supersaturation of 18 liquids, 24,25 grouped following their acentric factors. The acentric factor ͑in parentheses͒ is the additional parameter ͑in relation to van der Waals' equation͒ which is introduced in Peng-Robinson's equation: Ar ͑0.001͒, [26][27][28] Kr ͑0.005͒, 27 Xe ͑0.008͒, 27 CH 4 (0.011), 29 O 2 (0.025), 29 57 The lines on the right side are superpositions of the spinodal lines, corresponding to the experimental points and calculated by Peng-Robinson's equation of state, and the linewidth covers all these spinodals. The lines on the left side are similarly superpositions of the coexistence curves, corresponding to the experimental points and calculated by Peng-Robinson's equation of state, the linewidth covers all these coexistence curves, too.…”