The presence of thermionic emission at ordinary temperatures for cathodes in contact with dielectric liquids is demonstrated. The current voltage relation is shown to obey the law $I={I}_{0}{e}^{(\frac{\ensuremath{\epsilon}{(\ensuremath{\epsilon}FD)}^{\frac{1}{2}}}{\mathrm{kT}})}$, where $I$ is the current, $F$ the field, and $D$ the dielectric constant of the liquid. This is a modification of the Schottky law in vacuum. The effects of adsorbed hydrogen and oxygen, of surface irregularities, and of work function are discussed. The formation of a wax by electron bombardment of the liquid is also reported.