07-003. Probably German, early 1st quarter 20th century, unsigned, but very similar to one in Max Kohl's
1909 "Price List No. 50 - Physical Apparatus." The fixtures are made of bright polished and black
oxidized brass and are mounted between two 11 1/2" long steel rods that are screwed into a 5 1/8"
diameter x 5/8" thick brass base, with a 2 5/8" diameter mirror inset in the center of the base.
The optical fixtures include the mirrored base, a diagonal clear glass polarizing plate, a circular
stage with rotating gimbaled center plate, 3 condensing lenses, a rotating black mirror analyzer,
and a rotating nicol prism analyzer. The apparatus is in very good overall condition, with some
spotting of the lacquer finish on the base.
