magic lantern, for use with electric arc lamp for oxy-hydrogen limelight, by William Ladd, London, England, 1870. Fitted with condenser, projection apparatus, polarising microscope, diaphragms etc.
magic lantern, for use with electric arc lamp for oxy-hydrogen limelight, by William Ladd, London, England, 1870. Fitted with condenser, projection apparatus, polarising microscope, diaphragms etc.