71. Victorian-era monocular microscope. Ernst Leitz. c.1880.

It is a modern-looking device that incorporates technical innovations, although it still has only one goal. Its macro focus system is by rack on the optical tube. The micrometric by means of a large wheel located on the axis of the device. The condenser is complex with a double focus system and iris diaphragm closure. The lenses are manufactured by Ernst Leitz. The stage is fixed with a square shape. The stand is in the shape of a horseshoe and both it and the support shaft are made of blued steel, while the optical parts are made of brass. It measures 33 cm. High.