Compound microscope whose characteristics suggest it was made by Edmund Hartnack. The instrument carries the label of Meyer, an agent in Zurich. The foot hold a pillar supporting a rectangular platform with a condenser and a diaphragm. Fine focus is by turning a knob inserted in the pillar holding the body-tube. The body-tube is fitted with a double revolving objective changer. There are four eyepieces and three objectives. Belonged to the Gabinetto degli Invertebrati of the Istituto di Studi Superiori of Florence.