Details
A collection of Geissler tubes,
comprising a ladder tube, an evacuated tube with spiral, a miniature tube with fluorescent liquid, a spiral and twist tube, a spiral tube with evacuated chamber, another similar, a trumpet tube, a fluorescent mineral tube with two electrodes -- 4in. (10.8cm.) wide, and five other various tubes (C) (14)
comprising a ladder tube, an evacuated tube with spiral, a miniature tube with fluorescent liquid, a spiral and twist tube, a spiral tube with evacuated chamber, another similar, a trumpet tube, a fluorescent mineral tube with two electrodes -- 4in. (10.8cm.) wide, and five other various tubes (C) (14)