section
item
1930
Philips Ultrasol, the first mercury vapour arc
discharge sunlamp from the N.V. Philips
Gloeilampenfabrieken, Eindhoven, The Netherlands.
building
helivium.com
1930 - sunlamp (carbon arc)
1930 - sunlamp (mercury)
1931 - sunlamp (mercury)
1932 - Matthew Luckiesh
1934 - sunlamp (mercury)
1935 - sunlamp (carbon arc)
1936 - sunlamp (mercury)
1936 - other (heat and light)
1937 - sunlamp (mercury)
1937 - other (heat and light)
1938 - sunlamp (blended)
1938 - sunlamp (carbon arc)
1939 - sunlamp (blended)
1939 - other (massage with heat)
building 3 (time line),
section 4 (1930-1939)
