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Title
Ruins of an old cement factory in french Valbonnais #140801255
Description
In 1817, Louis Vicat 1786 - 1861 invented the natural cement by raising to 1400 ð C a limestone composed of 80% of calcium carbonate and 20% of clay. Many small businesses will start manufacturing near limestone sites with this composition in Matheysine, e.g. in Pont-du-Prêtre. Here the ruins of a large multilevel building for grinding, storage in silos.