Details
A liquid-filled Geissler tube,
with spiral and return twist centre, twin electrodes -- 22in. (57.1cm.) long; and a Crookes' pattern railway tube with six-blade mica wheel, on wood stand -- 10in. (26.7cm.) wide (2)
with spiral and return twist centre, twin electrodes -- 22in. (57.1cm.) long; and a Crookes' pattern railway tube with six-blade mica wheel, on wood stand -- 10in. (26.7cm.) wide (2)