The Spectra of Strontium Hydride

New SrH band systems photographed at high dispersion include: (1) an abbreviated $C{}_{}{}^2{}_{}{}^{}\Sigma \to N{}_{}{}^2{}_{}{}^{}\Sigma$ system with (0,0) band head at 3808A, (2) a many-lined $D{}_{}{}^2{}_{}{}^{}\Sigma \to N{}_{}{}^2{}_{}{}^{}\Sigma$ system between 5000A and 6700A, (3) an $E{}_{}{}^2{}_{}{}^{}\Pi \to N{}_{}{}^2{}_{}{}^{}\Sigma$ system consisting of a $\Delta v=0\mathrm{}$ sequence only with the (0,0) band at 5323A. The (0,0) and (0,1) $C$ bands have three violent perturbations and a sharp cut-off due to predissociation at $K^{\prime }=19\mathrm{}$. The form and magnitude of the perturbations are computed. Quantum analyses give $B_0=3.930\mathrm{}$ and $D_0=-9.31\mathrm{}\times {10}^{-4\mathrm{}}$ for the $C$ state, $B_1=3.56\mathrm{}$ for the normal state. Quantum assignments of the lines of the six principal branches of the (0,0) band of the $E$ system are presented. For the $E$ state $A=117\mathrm{}$, ${B^{*}}_{0, -\frac{1}{2}}=3.6388\mathrm{}$, ${B^{*}}_{0, +\frac{1}{2}}=3.8687\mathrm{}$ and perturbations at small $J$ values distort the $\Lambda$-doubling curve for the ${}_{}{}^2{}_{}{}^{}\Pi _{\frac{1}{2}}^{}{}_{}{}^{}$ state.