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the Dr. Kern Prinzess Vario-Filter K85 was a mercury vapour arc discharge sunlamp, combined with four quartz-tube elements
the Dr. Kern Prinzess Vario-Filter K85 was a mercury vapour arc discharge sunlamp, combined with four quartz-tube elements
1965
Dr. Kern Prinzess Vario-Filter, type K85, a mercury vapour arc discharge sunlamp,
combined with four quartz-tube elements. The amount of UV-B could be regulated with
the slider below the lamp, controlling the gap between the upper- and lower filter
segments.
building