This lecture delves into the micro-preparation of wooden samples to study the distribution of natural glue systems in wood. It covers the method development, resin investigation, knives investigation, and various wood species investigations. The lecture details the process of wood slicing with a thickness of 3 microns, allowing for the observation of microstructure and interactions with adhesives. It explores the mechanical properties of different wood species and the impact of growth rhythms on wood structure. The lecture also discusses the use of different resins, microtomy techniques, and microscopy principles in wood analysis.