細節
A double inverted liquid-filled Geissler pattern U-tube,
each column containing coloured fluorescent liquids and enclosing multi-spiral and twist tubes, with six truncated spherical bulbs and two pear-shaped bulbs with electrodes, on wood stand -- 13in. (33cm.) high (A)
each column containing coloured fluorescent liquids and enclosing multi-spiral and twist tubes, with six truncated spherical bulbs and two pear-shaped bulbs with electrodes, on wood stand -- 13in. (33cm.) high (A)