The absorption spectra of all the alkali halides except LiF and LiI, measured in the range 5.0 to 12.0 eV at 10°K, are presented. These data complement earlier measurements made at 80°K. Identification of excition lines involving d-like electrons is made by a comparison of the crystal absorption and the absorption spectra of rare-gas atoms. From the positions of exciton states with d-like electrons, the energy of the second conduction band at Γ is deduced for some of the alkali halides. The results of these deductions are compared with recent calculations of the conduction-band structure of KI and KCl.