Details
A fine 19th-Century mineralogical specimen Crookes' tube,
the pear-shaped bulb showing signs of lathe turning, the centre stem with five mineral samples, with two electrodes, on wood stand -- 16in. (42cm.) high (C)
the pear-shaped bulb showing signs of lathe turning, the centre stem with five mineral samples, with two electrodes, on wood stand -- 16in. (42cm.) high (C)