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pringsheim p luminescence liquids solids 1946

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Textbook in PDF format Tales about precious stones shining in the dark stretch back into antiquity. They are supposed to have adorned the temples of the gods and the crowTis of princes. This might have been the first technical application of luminescent material. However, the most reliable authors quoted as witnesses for the existence of such fabulous gems do not seem to have committed thom.sclves unambiguously. Aristotle’s pupil Theophrastus does not say more than that a carbuncle exposed to sunlight glows like a live coal. And some centuries later Pliny the elder repeats that a flame seems to burn inside of the crystal which he calls anthracite or phlogitis, synonyms of carbuncle. He saw it glitter in the moonlit night, without contending that the “(lame” was still visible in complete darkness. More than one minor compiler though, like Diodorus or Volinus, probably misunderstanding his sources or only telling from liearsay, affirms explicitly that a light is hidden in chrysoprase, still another name for the mysterious stone, and that it can be seen during the night like a candle. Aclianus, the poet , knows of a grateful stork which dropped a luminous stone into the lap of a woman at Tarentum as a reward for some kind action. This, of course, does not claim to be scientific information

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Pringsheim P. Luminescence of Liquids and Solids 1946.pdf 17.8 MB

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pringsheim p luminescence liquids solids 1946