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Updated: May 11, 2025
The first definite discovery of such a radio-active substance was made by M. Henri Becquerel, in 1896, while making some experiments upon the peculiar ore pitch-blende. Pitch-blende is a heavy, black, pitchy-looking mineral, found principally at present in some parts of Saxony and Bohemia on the Continent, in Cornwall in Great Britain, and in Colorado in America.
This deadly poison is obtained, I believe, by boiling down a particular root, the arrow-heads being dipped in the black, pitchy-looking essence which remains.
"But Jack knew his business; for just as a long, grim-looking villain, with a great rusty rapier in his hand, was within a single leap of them, and quite sure of either killing or making prisoners of them both, Jack flings a little drop of green water that he got in the filly's ear over his left shoulder, and in an instant there was a deep, dark gulf, filled with black, pitchy-looking water between them.
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