Description

A very rare model of microscope after Emile Bertrand and made by Alexandre Picart. It is signed signed “A. Picart 20, rue Mayet Paris”, we can date it circa 1870s’.

This is a very rare microscope, all the Bertrand-type microscopes and the Picart’s microscopes are very rare. Usually, the Bertrand’s or Picart’s microscope were used in mineralogy. Unfortunatly here, the prism above the eyepiece and the prism under the stage are lacking.

But the square stage which cannot be rotated indicated maybe that this microscope was never made for to be used in mineralogy.

For another simplified model of Bertrand’s microscope by Picard, see here : https://histoiredumicroscope.com/116-picart-alexandre-1900/.

For a longer article on Emile Bertrand, see here :

http://www.microscopist.net/Bertrand.html

The microscope is otherwise in perfect working condition and complete. The buttom on the micrometric screw is made in ebony and ebonite, not in brass.

A very rare microscope by the rarest French maker of polarizing microscope.

Around 41cm height.