GLYPH<s49>GLYPH<s48> GLYPH<s45>GLYPH<s49> GLYPH<s49>GLYPH<s48> GLYPH<s48> GLYPH<s49>GLYPH<s48> GLYPH<s49> GLYPH<s49>GLYPH<s48> GLYPH<s50> GLYPH<s49>GLYPH<s48> GLYPH<s51> GLYPH<s49>GLYPH<s48> GLYPH<s52> GLYPH<s49>GLYPH<s48> GLYPH<s53> GLYPH<s49>GLYPH<s48> GLYPH<s45>GLYPH<s50> GLYPH<s49>GLYPH<s48> GLYPH<s45>GLYPH<s49> GLYPH<s49>GLYPH<s48> GLYPH<s48> GLYPH<s49>GLYPH<s48> GLYPH<s45>GLYPH<s50> GLYPH<s49>GLYPH<s48> GLYPH<s45>GLYPH<s49> GLYPH<s49>GLYPH<s48> GLYPH<s48> GLYPH<s49>GLYPH<s48> GLYPH<s49> GLYPH<s49>GLYPH<s48> GLYPH<s50> GLYPH<s49>GLYPH<s48> GLYPH<s51> GLYPH<s45>GLYPH<s57>GLYPH<s48> GLYPH<s48> GLYPH<s57>GLYPH<s48> GLYPH<s49>GLYPH<s56>GLYPH<s48> GLYPH<s70>GLYPH<s114>GLYPH<s101>GLYPH<s113>GLYPH<s117>GLYPH<s101>GLYPH<s110>GLYPH<s99>GLYPH<s121>GLYPH<s32>GLYPH<s40>GLYPH<s72>GLYPH<s122>GLYPH<s41> GLYPH<s88> GLYPH<s32> GLYPH<s40> GLYPH<s44> GLYPH<s32> GLYPH<s84> GLYPH<s61> GLYPH<s50>GLYPH<s49>GLYPH<s48>GLYPH<s46>GLYPH<s50>GLYPH<s75> GLYPH<s41> GLYPH<s70>GLYPH<s114>GLYPH<s101>GLYPH<s113>GLYPH<s117>GLYPH<s101>GLYPH<s110>GLYPH<s99> GLYPH<s121> GLYPH<s32>GLYPH<s40>GLYPH<s72>GLYPH<s122> GLYPH<s41> GLYPH<s80>GLYPH<s104>GLYPH<s97>GLYPH<s115>GLYPH<s101>GLYPH<s32>GLYPH<s40>GLYPH<s100>GLYPH<s101>GLYPH<s103>GLYPH<s46>GLYPH<s41> GLYPH<s32> GLYPH<s32> FIG. 4: (Color online) The measured quantity X ( ω, T ) at 210.2 K (filled squares with dashed line) is compared to the same quantity calculated by using Eq. (2) with κ ≈ 7 . 6 × 10 − 17 K(m/V) $^{2}$). Dotted line: Calculated heating contribution (upper limit, the arrows indicate the possible reduction [14]). Inset: The phase of χ$_{3}$ ( ω, T ) at 210.2 K (same symbols as for the main figure, dotted line not shown). data exhibit a clear power-law behavior with a fitted exponent − 0 . 65 ± 0 . 04, see also Fig. 2, which is close to that describing the decay of ˆ χ$_{T}$ (2 ω ). This behavior is predicted by Mode-Coupling Theory [13], and our experimental exponent is compatible with the MCT prediction − b ≃ − 0 . 6 for glycerol [23]. Note however that MCT should in fact be relevant only at temperatures much higher than the ones we focused on. Hence, the existence of a power-law regime for large ω with identical exponents for both χ$_{1}$ and χ$_{3}$ appears to be a generic property, valid outside the MCT regime. We think that this might be related to the possible incipient criticality of the system. We now address the question of a possible heating contribution to our results. Such ef- fects would come from the fact that applying the field E ( t ) = E cos( ωt ) across the glycerol sample leads to a dissipated power per unit volume p ( t ) ∝ ωχ ′′ $_{1}$( ω ) E $^{2}$(1 + cos(2 ωt − φ )) 8