1. The Activation of Enzymes with Light.- 2. Radiation Synergism and Antagonism.- 3. The Melanins: Their Synthesis and Structure.- 4. The Role of Mutagenesis in Carcinogenesis.- 5. Physical Properties of Excited States: A General Method for Measuring Triplet-Triplet Extinction Coefficients, Singlet-Triplet Intersystem Crossing Efficiences, and Related Parameters.- 6. Mapping the Three-Dimensional Structure of Proteins by Photochemical Techniques.- 7. The Use of Microwaves for the Hyperthermic Treatment of Cancer: Advantages and Disadvantages.