This microscope's cylindrical tube moves vertically under friction inside a fixed drum for macroscopic focusing. The drum is supported on an arm extending from the cylindrical pillar, which has a screw at the end enabling the tube to be moved for microscopic focusing.

The rectangular stage is held on the front of the pillar. It has a central hole, and others for slide clips or magnifying glasses. On the underside is a disc with different-sized holes, which is used to control the light being reflected by a plano-concave mirror near the base. The mirror can be turned in various different directions. There is no tilt system.

The base is horseshoe-shaped with straight limbs that have a mechanism allowing them to be brought closer together. The manufacturer's name is engraved on the right-hand limb: "R & J. Beck Ltd. London. 21936."


  • Title: Compound microscope
  • Provenance: Microscopio procedente de la "Colección Bruni”, la cual consta de casi 80 microscopios correspondientes a los siglos XVIII, XIX y XX que fueron recolectados por el Doctor Blas Bruni Celli y donados por su hija Maria Eugenia Bruni a la RANM en 2016.
  • Type: Microscope
  • Rights: Ana Suela
  • Medium: Metal, glass

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