The Geissler tube is an evacuated glass cylinder with an electrode at each end, containing rarefied gasses such as neon, argon, or air; mercury vapor or other conductive liquids; or ionizable minerals or metals, such as sodium.
The Geissler tube is an evacuated glass cylinder with an electrode at each end. An evacuated glass cylinder with an electrode at each end is containing rarefied gasses such as neon, argon, or air. This is such as sodium. An evacuated glass cylinder with an electrode at each end is containing mercury vapor or other conductive liquids. This is such as sodium. An evacuated glass cylinder with an electrode at each end is containing ionizable minerals or metals. This is such as sodium.