"The mystery of the" Stone Light "by Paderno
dawn of the seventeenth century, the badlands of Paderno suddenly turns on the interest the international scientific community. On a Bolognese shoemaker, that Vincent Casciarolo, "who delighted in the things of troubled chemical. An amateur alchemist. In 1602, inerpicatosi Paderno "for fun by some of his natural melancholy," and looking for rocks to make paints, he discovered a stone "magic" that has the ability to "accumulate light." After being exposed to the sun, glows in the dark once for a little red glow. Today we know that the "rock phosphorus Bologna" consists of barite (barium sulfate). But one of the names by which the barite was then called "luciferin stone" gives an aura of mystery which is now surrounded. The nature of "magic" of its luminescence triggers an important scientific debate. The dispute also involved Galileo Galilei. And the stone becomes the star of Boulogne is chemical and ends at the center of learned dissertations Academy of Sciences in Paris. Soon, worked in small pills, and souvenirs research across Europe. In 1786 also the German writer Goethe salt Paderno looking stone. And he returns to Gernamia satisfied with "a dozen pounds in suitcases."
(Il Resto del Carlino - October 1, 2010)
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