During the radium craze of the 1910s, the element was potentially seen as a convenient source of lighting. The Electrical Experimenter. September 1915.
Internet Archive
seen from Russia
seen from Hong Kong SAR China
seen from Yemen
seen from China

seen from Malaysia
seen from United States
seen from United States
seen from Malaysia

seen from China
seen from United States

seen from United States

seen from China

seen from United States

seen from United States
seen from China
seen from United States
seen from Yemen
seen from Sweden

seen from United States

seen from Malaysia
During the radium craze of the 1910s, the element was potentially seen as a convenient source of lighting. The Electrical Experimenter. September 1915.
Internet Archive
Be proud of the chemical miracle you are!
STEP TO THE HARDCORE.
~ Undark, 1921
“Does Undark really contain radium? Most assuredly."
Undark was produced by the US Radium Corporation and was the product used by the "Radium Girls" to paint the dials of wristwatches. It also caused many of them to die painful deaths with the full knowledge of the Corporation.
More about the Radium Girls and the corrupt US Radium Corporation found here* and of course in Kate Moore's book The Radium Girls.
*warning for one historic picture of the effects of radium and a lot of descriptions of an evil corporation being evil
1981 Women's Day Magazine
Rip to the radium girls, you would’ve loved OSHA
Atomic Energy Mineralogy Kit. You can experiment with atomic energy. Page from the Johnson Smith & Co. novelties catalog - 1955.