The addition of a fine polished wooden stand with metric graduations enhances the aesthetic appeal and stability of the Nicholson hydrometer setup, making it suitable for display and easy to use for measurements. The wooden stand provides a stable base for the hydrometer, ensuring accurate readings without any wobbling or instability.

As for the manometer, it's a precision instrument used for measuring pressure. The U-tube manometer, whether in a wall hanging or table model, consists of a U-shaped glass tube partially filled with a liquid such as mercury or colored water. The difference in height between the two arms of the U-tube indicates the pressure difference between the two points being measured.