Reflecting microscope invented by Giovanni Battista Amici. This instrument is mounted on a tripod to which a square-sectioned pillar is fastened. The illumination mirror is attached to the pillar. The stage slides on the pillar by rackwork. The image is focused by adjusting the position of the stage relative to the body-tube attached horizontally to the pillar. The Huygenian eyepiece has a low magnification power. Probable provenance: Lorraine collections.