"Anything made out of destructible matter Infinite time would have devoured before. But if the atoms that make and replenish the world Have endured through the immense span of the past Their natures are immortal-that is clear. Never can things revert to nothingness!"

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The whole subject of the X rays is opening out wonderfully, Bragg has of course got in ahead of us, and so the credit all belongs to him, but that does not make it less interesting. We find that an X ray bulb with a platinum target gives out a sharp line spectrum of five wavelengths which the crystal separates out as if it were a diffraction grating. In this way one can get pure monochromatic X rays. Tomorrow we search for the spectra of other elements. There is here a whole new branch of spectroscopy, which is sure to tell one much about the nature of an atom.

— Henry Moseley