...Manygeologists and mining engineers knew that the radium was there, fortheir instruments had proven it often; but no one up to then knew howto get to it... 
Various 「Astounding Stories, April, 1931」
...And the heavy, gray powder with its admixture of radium thattransformed it to super-detonite—this must be carefully charged intothe magazines of the generators...
Various 「Astounding Stories, May, 1931」
..."No, it's absolutely safe now, and will be safe until this stud isturned, releasing the activating gas from one compartment to minglewith the radium compound in the other section...
Various 「Astounding Stories, May, 1931」
...Also, I would imagine that it wouldn't be safe to handle achunk of radium like the characters in the story did; it'sliable to burn...
Various 「Astounding Stories, July, 1931」
...] Imagine being four miles inside of the earthexposed to radium "ore"!...
Various 「Astounding Stories, July, 1931」
...You know that radium isactivated and glows under ultra-violet?"...
Various 「Astounding Stories of Super-Science September 1930」
...By the side ofeach one is a wide angle telescopic concentrator which will focus anyreflected ultra-violet onto a radium coated screen and thus make itvisible to us...
Various 「Astounding Stories of Super-Science September 1930」
...This ship is radium propelled, and the men andwomen are the slaves who work in the radium mines...
Various 「Astounding Stories of Super-Science September 1930」
...It leaped into view on the radium coated screen...
Various 「Astounding Stories of Super-Science September 1930」
...It usually occurs with silver, that is, the uranium motherore does, through the disintegration of which radium is formed...
Various 「Astounding Stories of Super-Science, June, 1930」
..."That radium stuff is what makes the funny light in that mine, then?"asked Maget...
Various 「Astounding Stories of Super-Science, June, 1930」
...The professor forgot himself in a lecture on the properties of radium...
Various 「Astounding Stories of Super-Science, June, 1930」
...Otherwise wewould be burned by radium rays...
Various 「Astounding Stories of Super-Science, June, 1930」
..."That stuff is radium...
Various 「Astounding Stories of Super-Science, June, 1930」
...ow the horde of monsters swelled more and more; the bats and mothswinged in mad frenzy about the open door of the radium shack...
Various 「Astounding Stories of Super-Science, June, 1930」
..."Anita, when you go back, tell Mikowe discussed radium ores...
Various 「Astounding Stories of Super-Science April 1930」
..."Tell your Earth that I want theentire supply of your radium oresmined and placed above groundaccording to the instructions Igive, by seven of your days hence...
Donald Wandrei 「Raiders of the Universes」
... Bodies such as radium, thorium, etc...
Garrett Serviss 「Curiosities of the Sky」
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