This compound microscope is of the type made by Giovanni Battista Amici. The square-sectioned pillar supporting the instrument is hinged to round base. The stage, fitted with a micrometer movement, tilts for fine focus. The body-tube has a Huygenian eyepiece and is adjusted for coarse focus by rackwork. Between the stage and the illumination mirror, a condenser lens can be inserted. There are two illumination prisms mounted on two articulated arms.