Coarse focus is rack & pinion controlled by two knurled knobs (arrow). The lower support pillar is attached to the fine focus mechanism mounted inside the box. Note the ornate scrollwork on the pillar.
The axial position of the microscope body can be moved laterally using this translating mechanism. The thumbscrew (arrow) moves both plates left or right. The two plates clamp onto the microscope mounting shaft, allowing the microscope to rotate into the horizontal, or aquatic position.