Swift & Son, London
Polarizing microscope (lacquered brass) with black lacquered
brass limb and body tube and black enameled iron horseshoe
base in fitted mahogany case with accessories.
Main focus by rack and pinion and fine focus by thumbwheel
micrometer. Circular rotating stage with 360-degree scale.
Swing out polarizer (Nicol prism) and condenser lens.
The analyzer (Nicol prism) is fitted on a sliding shoe
into the lower part of the body tube. Double nosepiece.
Height 35 cm.
Signed on the limb "J. SWIFT & SON | LONDON",
and serial number "17726", early 20th century.
The instrument was originally made to be used on the Geological
Survey of Great Britain.
Collection: private collection