Meissen porcelain further precaution, very few workers knew the special secret ("arcanum") of how to make porcelain, and then perhaps only part of the process. Thus, for a few years, Meissen retained its monopoly on the production of hard-paste porcelain in Europe. By 1717, however, a competing production was set up at Vienna, as Samuel Stöltzel sold the secret recipe, which involved the use of kaolin, also known as china clay. By 1760 about thirty porcelain manufacturers were operating in Europe, most of them, however, producing frit based soft-paste porcelain. In order to identify the original Meissen products, Meissen developed markings that
Querelles de famille In the other, he asks for the creation of a "Ministry of Noise", charged with legislating schedules for the use of musical appliances and radios on beaches, with studying the impact of noise on health, with proposing industrial procedures for the neutralization of noise, and finally, his dream, with creating a national park of silence. This novel directly follows "Scènes de la vie future" (Scenes of Future Life) which recounts his trip to the United States in the years 1929 and 1930 and the excesses of the consumer society that he discovers there. Querelles de famille Querelles de famille (Family