We present the results of an experimental study of the bulk photoconductivity of crystalline anthracene induced by high-power ($I\ensuremath{\simeq}{10}^{22}\ensuremath{-}{10}^{24}$-photon ${\mathrm{cm}}^{\ensuremath{-}2}$ ${\mathrm{sec}}^{\ensuremath{-}1}$) tunable dye lasers in the wavelength region $\ensuremath{\lambda}=6943\ensuremath{-}4150$ \AA{}. The kinetic data for the dependence of the charge carrier density $m$ on the excitation intensity $I$ fall into three regions: (I) In the excitation region $\ensuremath{\lambda}=6943\ensuremath{-}6180$ \AA{} a $m\ensuremath{\propto}{I}^{3}$ dependence has been observed originating from photoionization of two-photon-excited singlet states. (II) In the range $\ensuremath{\lambda}=6120\ensuremath{-}4600$ \AA{} a complex, superlinear pattern was observed, exhibiting a $m\ensuremath{\propto}{I}^{2}$ dependence at low $I$ and $m\ensuremath{\propto}{I}^{4}$ dependence at high $I$. In this range, where excitation occurs via two-photon absorption, three charge-carrier-generation processes involving autoionization of metastable excitons, exciton photoionization, and exciton-exciton collision ionization are operating. Detailed information was obtained regarding the energy dependence of the generation coefficients for these processes. (III) In the excitation range $\ensuremath{\lambda}=4600\ensuremath{-}4400$ \AA{} a $m\ensuremath{\propto}{I}^{2}$ dependence was observed and interpreted in terms of photoionization of one-photon-excited singlet states. From the generation coefficients in regions I and III and from the $m\ensuremath{\propto}{I}^{3}$ generation coefficient in region II, detailed information has been obtained regarding the energy dependence of the cross section for exciton photoionization. From the $m\ensuremath{\propto}{I}^{4}$ generation coefficient in region II we have obtained the rate coefficient (4 \ifmmode\pm\else\textpm\fi{} 2) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}12}$ ${\mathrm{cm}}^{3}$ ${\mathrm{sec}}^{\ensuremath{-}1}$ for the exciton collision ionization while the autoionization efficiency of metastable excitons produced by exciton collisions is (7 \ifmmode\pm\else\textpm\fi{} 4) \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}5}$. The two-photon-induced $m\ensuremath{\propto}{I}^{2}$ generation coefficients in region II, normalized by the two-photon-absorption cross sections, result in a detailed energy dependence of the autoionization efficiency $\ensuremath{\eta}(E)$. The direct onset to the conduction band is ${E}_{g}=4.08\ifmmode\pm\else\textpm\fi{}0.04$ eV. $\ensuremath{\eta}(E)$ yields a reasonable measure for the weighted density of states for interband transitions, providing experimental evidence for narrow (\ensuremath{\sim} 1000- ${\mathrm{cm}}^{\ensuremath{-}1}$) vibronic components of the valence and conduction band, which exhibit vibrational structure near the threshold.