I. The Isomeric 2,3-Epoxypentanes and 2-Pentanes. The Extent to Which Mixtures of Diastereomers are Formed in Reactions of Some Pentane Compounds. II. The Preparation of Cyclopropane. III. The Thermal Decomposition of Trans-1,2-Cyclobutane-Bis(Trimethylammonium) Hydroxide