Introduction.- Large-scale Passive Scalar Transport.- Steady-flow Dynamos.- Time-periodic Flow Dynamos.- Convective Plan-form Dynamos in a Layer.- Linear Stability of Steady MHD States to Large-scale Perturbations.- Weakly Nonlinear Stability of MHD Regimes.- Forced Hydromagnetic Thermal Convection: Weakly Nonlinear Stability to Large-scale Perturbation.- Free Hydromagnetic Thermal Convection: Weakly Nonlinear Stability to Large-scale Perturbations.- Magnetic Field Generation by Large-amplitude Flows With an Internal Scale in an Axisymmetric Volume. One Azimuthal Fast Variable.- Magnetic Field Generation by Large-amplitude Flows With an Internal Scale in a Sphere. Three Fast Variables.- General Conclusions and Perspectives.- References.- Appendix. Regimes of Free Hydromagnetic Thermal Convection, Symmetric About a Vertical Axis.