Projector polariscope

Jules Duboscq Ph. Pellin, Paris
Polariscope - optical bench to demonstrate and investigate polarization phenomena in crystals by means of projection.
Lacquered brass polariscope and accessories on cast iron base Height to top of instrument with stand closed is 50 cm.  It can be extended to 65 cm by the slip joint in the pillar.  Length is 40 to 45 cm depending on where the pieces are mounted on the slide brass rail. No further accessories.
Signed "Mon. Jules Duboscq Ph. Pellin, Paris" on the rail, end 19th century.

Collection: Mark McElyea