Collier's New Encyclopedia

A complete general encyclopedia of 1921 — the world as it was understood just after the Great War, from Aachen to Zwingli, across twelve volumes and six thousand pages.

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Radium

an element recently discovered combined with polonium. Radium was discovered in 1898 by M. and Mme. Curie of Paris. It is worth from $100,000 to $200,000 a gram. It throws out heat, light, and energy without loss of intensity, and without waste or diminution. Its principal practical use thus far has been in medical science for cure of cancer and restoration of eyesight. of

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