The document outlines the main parts of a microscope, including the eyepiece for viewing specimens, the revolving nosepiece for attaching different objectives or lenses, and the stage for holding specimens in place under the objectives. It also describes other key parts like the body tube connecting the eyepiece and nosepiece, coarse and fine adjustments for focusing, a condenser for illuminating specimens, and a mirror and diaphragm for controlling light. In total, the document identifies 14 main parts that make up a standard microscope.