Figure 3
From: Possible Evidence for a New Form of Liquid Buried in the Surface Tension of Supercooled Water
(a) The deviation of real water surface tension from the IAPWS equation is captured by the IAPWS-E equation. The experimental error bar shown was reported by Hruby et al.2. (b) The histograms show the distribution of the deviations of the experimental surface tension from the IAPWS or IAPWS-E equations. Although distribution of the deviations from the IAPWS-E equation is symmetric and resembles that of a random noise, the deviations from the IAPWS equation are heavily biased to the positive. Data from all five sets of experimental measurements were included in these histograms.
