Organic Chemistry: the Chemistry of Animate Nature, 76. 2. The Earlier Theories of Structure of Organic Compounds, 77. 3. Saturation Capacity and the Modern Structure Theory, 86. 4. Benzene and the Cyclic Compounds, 88. 5. Dynamic Isomerism, 100. 6. Steric Hindrance, 105. 7. Stereo isomerism (a) Geometrical Isomerism, 107. 8. Stereo isomerism: (b) Optical Isomerism, 111.