Pacini-type compound microscope, named after its inventor, Filippo Pacini. Similar to microscope inv. 3267. A shaped brass plate carries a telescopic pillar, whose height is adjusted by rackwork for coarse focus. The pillar carries the body-tube. Fine focus is by a knob-and-screw assembly below the base. The body-tube is tilted and attached to the support by means of a total-reflection prism that deflects the rays from the objective into the eyepiece. The circular stage carries a revolving disk with diaphragms. It rests on two tapered pillars fixed to the base and is moved by means of a screw fitted with a graduated disk. There is an illumination mirror and a condenser lens. Some technical details suggest that the instrument may have been made by Angiolo Poggiali.