*An early magnetically stabilized Hydrogenplasma from 1961* The discharge vessel was called Eieruhr, that is egg-timer, because of its shape. Quantum numbers of the Balmer spectrum are shown at the blue plasma bunching, sufficient line broadening, a series limit, and linemerging at number n=20. The magnet wires are thick with the current strength and actually watercooled! A photo is taken during discharge. (Holding the sun in your hand. Be careful: Three researchers once got a painful sun burn on the cornea.) We are surprised by the precision with which the numbers can be counted. https://de.wikipedia.org/wiki/Balmer-Serie The article is  here: http://zfn.mpdl.mpg.de/xtf/data/Reihe_A/16/ZNA-1961-16a-0972.pdf The later (sixties) apparatus certainly is more elegant and technically advanced engineered. We found no photos yet. The photos are licensed: http://creativecommons.org/licenses/by-nd/3.0/ and from the abovementioned article of H. Schlüter. His *Abstract*: With an rf-discharge an extremely clean BALMER-spectrum is obtained having a line-melting at the principal quantum number 20. Electron temperature, gas temperature, and electron density are determined. The ionization-recombination-balance is considered with a modified form of the Corona-ionization-formula. H epsilon is a violet line coming from the transition of an electron from the 7th shell to the second.