The Radium Research Laboratories of the Standard Chemical Company, of Pittsburgh.

This is a view of what is called the Crystallization Room. After 500 tons of Ore has been reduced to less than a quarter of
a ton, it is in the form of Radium barium chloride. In that form it is brought to these Laboratories, and after treatment for four
weeks, whatever Radium may have been in the original ore, is recovered.
Between the time the ore is first mined and the time it reaches these Laboratories, it has been handled for a period of five
months in the Concentration Mill in the West and in the Radium Refining Plant just outside the City of Pittsburgh.