FIG. 3: Real part Y ′ and imaginary part Y ′′ of different porous samples filled with salol. Lines are fits using Eqs. (3a,b) and (1) with parameters of Tab. II. dence of the relaxation time as τ ( T, d ) ∝ exp [ E ( d ) T − T 0 ( d ) ] and found similar d -dependencies for the mode-coupling critical temperature T$_{c}$ ( d ) and the Vogel-Fulcher temperature T$_{0}$ ( d ) arguing, that T$_{g}$ ( d ) should also follow a similar curve (see Fig. 14 of Ref. 43). As already mentioned above we here use the same dependence of the relaxation time (Eq. (1)) to fit our data, and obtain a very similar size dependence of T$_{g}$ ( d ) and T$_{0}$ ( d ) (Fig. 7) as Varnik et al. A. Hunt [44] has calculated finite size effects on the glass transition temperature in glass- forming liquids analytically using percolation theory, yielding where r$_{0}$ is the typical distance between molecules, which we approximate as the diameter of a salol molecule r$_{0}$ ≈ 0 . 8 nm. Using a Gaussian distribution of energy barriers, the author obtained a value of c ≈ 0 . $_{27}$. A fit of our experimentally determined T$_{g}$ ( d ) (Table II) with Eq. (4) yields c ≈ 0 . 13 and T bulk g ≈ 216 K (Fig. 7), which is in rather good agreement with the theoretical estimate. In this picture T$_{g}$ is reduced by confinement because the average barrier height for the molecules in pores is smaller than the so called "blocking" barrier, which is responsible for the glass freezing in the bulk. We have also plotted the values of T$_{0}$ ( d ) of Table II in Fig. 7. The corresponding line was drawn using the relation 10 T$_{g}$ ( d ) = T bulk g ( 1 − c r$_{0}$ d ) (4)