This simple principle of electrical precipitation of dust was noticed by Hohlfeld of Germany in 1824 as he watched the behavior of an electrical discharge in smoke. Nothing came of his observation until 1884 when Sir Oliver Lodge successfully applied the principle in a lead smelter. Electrical precipitation of dust did not become widely practical until 1906 when Cottrell, who had worked with Lodge, brought out the precipitator that bears his name.Hmm. Lodge. Where have we heard that name? And where have we heard 1906? Most of the article discusses various modern precipitators, based on the 1906 Cottrell invention. This chart of the Dust Spectrum is especially useful. (I tacked on Orange Man Bad "virus" for future reference, but it's not the focus here.)
Labels: Carbon Cult, defensible spaces, defensible thymes, defensible times
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