Compass microscopes are hand-held microscopes. They were considered easy to use although accurately focussing on objects was difficult. They are known as compass microscopes as the lens holder and the object holder are both pivoted and the distance between the two can be adjusted. The fish skin-covered wooden box contains additional lenses and mounts.
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Glossary: compass microscope
Hand held simple microscope with compass like focusing arm, adjustable arm for specimen and eyepiece reflector (Lieberkuhn)
The use of microscopes to study objects or samples. The three major types of microscopy are optical, electron and scanning probe microscopy.