Solar Energy Sources.- Structure and Dynamics of the Solar Corona.- Large-Scale Magnetic Fields and Activity Patterns on the Sun.- Local Magnetic Fields on the Sun.- Properties of Solar Active Regions.- Permanent Sources of Particle Emission from the Sun.- Solar Discrete Particle Events.- Solar Radiobursts.- Evidence that Solar X-Ray Emission is of Purely Thermal Origin (Also Observation of Far UV Flash During 28 August 1966 Proton Flare).- Particle Acceleration and Plasma Ejection from the Sun.- Particle Diffusion in the Solar Corona.- Time Variations in Solar Activity.- Methods for the Forecasting of Solar Flares.