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All Quotes by author - Frederic Joliot-Curie

" Astronomers sometimes observe that a star of medium magnitude increases suddenly in size; a star invisible to the naked eye may become very brilliant and visible without any telescope - the appearance of a Nova. "

" In England and the United States, where physicists have at their disposal equipment of very high voltages, several new elements were prepared using protons and deuterons as projectiles. "

" The first unquestionable proofs of the transformation of elements into different chemical elements have been provided by the study of the phenomena of radioactivity. "

" There is no doubt that radium is transformed spontaneously into an active gas, radon, emitting at the same time alpha particles, or helions. "

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